Student Name Western Governors University D312 Anatomy and Physiology I with Lab Prof. Name Date Chapter 1 What is Anatomy and Its Subdisciplines? Anatomy is a scientific field dedicated to investigating the structures of the body, including aspects such as the shape and size of bones and the relationship between structure and function. One key branch, Developmental Anatomy, examines the structural changes that occur from conception through adulthood. Within this area, Embryology focuses specifically on development from conception to the end of the eighth week of gestation. On a smaller scale, Cytology studies the structural features of cells using microscopes, while Histology explores tissues composed of cells and the surrounding materials. Gross Anatomy pertains to body structures visible without the aid of a microscope, and it can be approached in two ways: Systemic Anatomy, where the body is studied system by system, and Regional Anatomy, where the body is examined area by area. Surface Anatomy involves observing the external body to infer the position and structure of deeper internal parts, such as visualizing and palpating the sternum and ribs on the chest. With advances in technology, Anatomical Imaging techniques like X-rays, ultrasound, and MRI have become vital tools for examining body structures non-invasively. Are all human bodies structurally identical? No. Each individual has unique anatomical variations known as Anatomical Anomalies, which are physical characteristics differing from the standard pattern. What is Physiology and How Does It Relate to Anatomy? Physiology is the scientific study of the functions and processes of living organisms. Its primary goal is to understand and predict how the body responds to various stimuli and maintains internal conditions within narrow limits despite changing environments. Physiology often examines entire systems rather than individual regions. Different branches of physiology include: Anatomy and physiology are inseparable because understanding body structures (anatomy) is essential for understanding their functions (physiology). In medical science, Pathology studies diseases by examining their causes, development, and the structural and functional changes they induce. What are the Six Levels of Body Organization? The human body is organized into six hierarchical levels, each more complex than the previous one: Level Description Example 1. Chemical Level Involves atoms and molecules, the smallest building blocks of matter. Collagen molecules that provide skin with strength and flexibility. 2. Cell Level Basic structural and functional units of life formed by molecules. The nucleus, which contains hereditary information within a cell. 3. Tissue Level Groups of similar cells and extracellular material working together. Four types: epithelial, connective, muscle, and nervous tissues. 4. Organ Level Structures made of two or more tissue types performing specific functions. Heart, stomach, lungs, urinary bladder. 5. Organ System Level Groups of organs that work together to perform common functions. Urinary system, including kidneys, ureters, bladder, and urethra. 6. Organism Level The entire living being composed of multiple organ systems. A human being, consisting of trillions of cells functioning as a whole. What Are the Major Organ Systems and Their Functions? There are 11 major organ systems, each with unique roles in maintaining life and health. Organ System Primary Functions Components 1. Integumentary Protects body, regulates temperature, prevents water loss, produces vitamin D Skin, hair, nails, sweat glands 2. Skeletal Supports body, protects organs, allows movement, produces blood cells, stores minerals Bones, cartilages, ligaments, joints 3. Muscular Enables movement, maintains posture, produces heat Skeletal muscles attached by tendons 4. Nervous Detects sensations, controls movements and physiological processes, intellectual functions Brain, spinal cord, nerves, sensory receptors 5. Endocrine Regulates metabolism, growth, reproduction via hormones Glands like pituitary, thyroid 6. Cardiovascular Transports nutrients, wastes, gases, hormones; immune response; temperature regulation Heart, blood vessels, blood 7. Lymphatic Removes foreign substances, combats disease, maintains fluid balance, absorbs fats Lymphatic vessels, nodes, organs 8. Respiratory Exchanges oxygen and carbon dioxide, regulates blood pH Lungs, respiratory passages 9. Digestive Breaks down food, absorbs nutrients, eliminates waste Mouth, esophagus, stomach, intestines, accessory organs 10. Urinary Removes wastes, regulates pH, ion and water balance Kidneys, urinary bladder, ducts 11. Reproductive Produces sex cells and hormones, supports fertilization and development Female: ovaries, uterus, mammary glands; Male: testes, ducts, penis What Are the Six Essential Characteristics of Life? Living organisms share six fundamental characteristics: What is Homeostasis and How Is It Maintained? Homeostasis is the process by which the body maintains a stable internal environment around a set point, despite external fluctuations. For example, normal body temperature averages 98.6°F (37°C), but it can fluctuate slightly between 98.4°F and 98.8°F. Homeostasis is regulated primarily by negative feedback mechanisms, which work to reduce deviations from the set point. These mechanisms include three main components: In contrast, positive feedback amplifies deviations from the set point, often driving processes to completion, such as the uterine contractions during childbirth. While many positive feedback mechanisms are beneficial, some can be harmful, such as those during a heart attack. What is the Anatomical Position and Common Directional Terms? The anatomical position refers to a person standing upright, facing forward, with arms at the sides and palms facing forward. Understanding this position is essential for describing body locations and directions accurately. Directional terms include: Term Meaning Example Superior (Cephalic) Toward the head or upper part Chin is superior to the navel Inferior (Caudal) Away from the head or toward the lower part Navel is inferior to the chin Anterior (Ventral) Front of the body Navel is anterior to the spine Posterior (Dorsal) Back of the body Spine is posterior to the breastbone Proximal Closer to point of attachment Elbow is proximal to the wrist Distal Farther from point of attachment Wrist is distal to the elbow Medial Toward the midline Nose is medial to the eyes Lateral Away from the midline Nipple is lateral to the breastbone Superficial Toward the body surface Skin is superficial to muscle Deep Away from the body surface Lungs are deep to the ribs What Are the Body Planes and Sections? Body planes divide the body into sections for anatomical study: Plane Description Sagittal Vertical plane dividing body into right and left parts Median (Midsagittal) Sagittal plane dividing body into equal halves Transverse (Horizontal) Divides body into superior (upper) and inferior (lower) parts

Student Name Western Governors University D312 Anatomy and Physiology I with Lab Prof. Name Date Lab 3 Mitosis and Meiosis BIO201L Pre-Lab Questions 1. What are chromosomes made of? Chromosomes consist of protein complexes known as chromatin, which organize DNA into specific units called genes. This chromatin-DNA structure allows the compact packaging of genetic material while enabling gene regulation and expression. 2. Compare and contrast mitosis and meiosis. Aspect Mitosis Meiosis Starting cell type Begins with diploid parent cells Begins with diploid parent cells DNA replication DNA is copied once before division DNA is copied once before division Type of division Cell division in eukaryotic cells Cell division in eukaryotic cells Number of daughter cells Produces two daughter cells identical to parent Produces four daughter cells genetically different from each other Location Occurs throughout the body (somatic cells) Occurs only during sexual reproduction (gametes) Chromosome number in daughters Daughter cells have 46 chromosomes (diploid) Daughter cells have 23 chromosomes (haploid) Mitosis produces two genetically identical diploid daughter cells, suitable for growth and repair. Meiosis, in contrast, produces four genetically diverse haploid cells essential for sexual reproduction, involving two rounds of cell division. 3. Cancer and Uncontrolled Cell Division: Causes and Potential Drug Development Cancer arises from uncontrolled cell division. Two major causes include: Based on these insights, an effective drug could be designed to: Experiment 1: Observation of Mitosis in a Plant Cell Mitosis Predictions Prediction:Interphase will take up to 22 hours, being the longest phase in the cell cycle, while mitosis will last approximately 2 hours. Supporting Evidence:Interphase typically dominates the cell cycle, lasting about 18-24 hours. The onion root tip cells studied have a cycle of about 24 hours, with interphase expected to occupy the majority of this time. Table 1: Mitosis Predictions Phase Predicted Duration Notes Interphase Up to 22 hours Longest phase, most time spent here Mitosis Approximately 2 hours Cell division phase Table 2: Mitosis Data from Onion Root Tip Cells Stage Number of Cells Total Cells % Time Spent in Stage Interphase 14 34 41.18% Prophase 4 34 11.76% Metaphase 5 34 14.71% Anaphase 6 34 17.65% Telophase 3 34 8.82% Cytokinesis 2 34 5.88% Note: The percentage reflects the relative time the cells spend in each stage. Observations on Cell Stages (with drawings as part of the experiment) Post-Lab Questions 1. Label the arrows on the slide image with the appropriate cell cycle stages. 2. In which stage were most onion root tip cells found? Why? Most cells were in interphase, which aligns with the understanding that this phase is the longest in the cell cycle, allowing the cell to grow and prepare for division. 3. How does the surface area to volume ratio change as a cell grows, and how is this related to cell division? As a cell grows, its surface area to volume ratio decreases. For example, blowing up a balloon increases the volume faster than the surface area. A decreasing ratio limits efficient diffusion of nutrients and waste, signaling the need for cell division to restore a favorable ratio. 4. What is the function of mitosis in a cell about to divide? Mitosis replaces old, damaged, or worn-out cells by producing new cells that are genetically identical to the parent, ensuring proper growth and maintenance. 5. What would be the consequence of uncontrolled mitosis? Unregulated mitosis leads to excessive cell proliferation, potentially resulting in cancer as abnormal cells continuously divide and accumulate. 6. How accurate were your time predictions for each cell cycle stage? Predictions were fairly accurate; most cells were in interphase, supporting the notion that it is the longest phase. 7. What interesting observation did you make while examining the onion root tip cells? It was interesting to observe mitosis occurring in various stages simultaneously, highlighting the dynamic nature of cell division during growth. Experiment 2: Tracking Chromosomes Through Mitosis Post-Lab Questions Question Answer How many chromosomes were present before mitosis? 46 chromosomes How many chromosomes did daughter cells contain after mitosis? 46 chromosomes per daughter cell Example of a cell that undergoes mitosis and importance? Eukaryotic somatic cells. Identical information ensures proper cell function and tissue integrity. Why do skin cells divide faster than neurons? Skin cells protect the body and require frequent renewal; neurons are more specialized and divide less. What happens if sister chromatids fail to split equally? Unequal distribution causes one cell to have excess chromosomes and the other to be deficient, leading to genetic abnormalities. Experiment 3: Tracking Chromosomal DNA Movement Through Meiosis Post-Lab Questions Question Answer How does crossing over affect genetic content in gametes? Crossing over exchanges chromosome segments, generating unique genetic combinations in gametes, enhancing genetic diversity. What is the ploidy after meiosis I and meiosis II? Meiosis I produces haploid daughter cells; meiosis II maintains haploid status but results in four cells. Differences between meiosis I and meiosis II Meiosis I separates homologous chromosomes and involves crossing over; meiosis II separates sister chromatids and does not involve crossing over. Severity of nondisjunction in meiosis I vs. meiosis II Nondisjunction in meiosis I affects homologous chromosomes and is generally more severe, leading to disorders like Down Syndrome. Why reduce chromosome number in gametes but not in other cells? Gametes must be haploid to ensure chromosome number remains stable after fertilization; somatic cells remain diploid for normal function. Chromosome count in blue whale cells Sperm and egg cells: 22 chromosomes each; daughter cells from mitosis: 44 chromosomes; daughter cells from meiosis II: 22 chromosomes. Experiment 4: The Importance of Cell Cycle Control Examples of Chromosomal Abnormalities Syndrome Description Turner’s Syndrome (XO) Missing sex chromosome Klinefelter Syndrome (XXY) Extra sex chromosome Angelman Syndrome Chromosomal deletion HeLa Cells Immortalized cancer cell line Triple X Syndrome (XXX) Extra sex chromosome Post-Lab Questions References Weinberg, R. A. (2014). The Biology of Cancer (2nd ed.). Garland Science. Alberts, B., Johnson, A., Lewis, J., et al. (2015). Molecular Biology of the Cell (6th ed.). Garland Science. Lodish, H., Berk, A., Kaiser, C. A., et al. (2020). Molecular Cell Biology (8th ed.). W.H. Freeman.

Student Name Western Governors University D312 Anatomy and Physiology I with Lab Prof. Name Date D312: Anatomy and Physiology I with Lab Lab Questions Section 3 – Skeletal Anatomy and Structure of Bones and Bones of the Head and Neck This section contains questions from the course material related to the skeletal anatomy and bone structure. Each question is answered with explanations for all answer choices, highlighting why the correct choice is accurate and why the others are incorrect, unless otherwise noted. Additionally, labeling of bone components is included where applicable. 1. Which bone cells are entrapped in the bone matrix? Choice Explanation a. Osteoclast cells Incorrect. Osteoclasts are large, multinucleated cells involved in bone resorption but are not entrapped in the matrix. They break down old or damaged bone tissue. b. Osteogenic cells Incorrect. These are undifferentiated precursor cells found in the periosteum and endosteum that differentiate into osteoblasts but are not embedded in the matrix. c. Osteoblast cells Incorrect. Osteoblasts build bone matrix but are not embedded in it; they eventually become osteocytes. d. Osteocyte cells Correct. Osteocytes are mature bone cells that are entrapped within the bone matrix. They originate from osteoblasts that become trapped after secreting the bone matrix. 2-5. Label the components of the bone matrix (No explanation needed): Label Name A Spongy Bone B Bone Marrow C Compact Bone D Periosteum 6. Which statement about the diaphysis labeled D is true? Choice Explanation a. The diaphysis is comprised of compact bone and cartilage. Incorrect. The diaphysis consists primarily of compact bone. Cartilage is typically located at the bone ends (epiphyses), not within the diaphysis. b. The diaphysis is mostly compact bone. Correct. The diaphysis mainly consists of dense, strong compact bone; cartilage is not part of the diaphysis but rather in growth plates. c. The diaphysis is comprised of spongy bone and cartilage. Incorrect. Spongy bone is found primarily in the epiphyses, not in the diaphysis, and cartilage is not present within the diaphysis. d. The diaphysis is mostly spongy bone. Incorrect. Spongy bone is located in the epiphyses; the diaphysis contains compact bone for strength and support. 7. Which image is classified as an irregular shaped bone? Choice Explanation a. A – Long bones Incorrect. Long bones are longer than they are wide and function as levers, such as the femur. b. B – Sesamoid bones Incorrect. Sesamoid bones are small bones embedded within tendons, like the patella. c. C – Flat bones Incorrect. Flat bones are thin and broad, consisting of two compact bone layers with spongy bone in between. d. D – Irregular bones Correct. Irregular bones have complex shapes, such as vertebrae, sphenoid, and ethmoid bones. 8. Which type of bone is labeled A? Choice Explanation a. Irregular bones Incorrect. Irregular bones have complex shapes and are not typically cylindrical. b. Short bones Incorrect. Short bones are roughly equal in length and width, like carpals, not long and cylindrical. c. Long bones Correct. Long bones have a long shaft with expanded ends, mainly composed of compact bone, acting as levers. d. Flat bones Incorrect. Flat bones are thin and broad, unlike the labeled bone A. 9. Bones that surround the spinal cord are classified as ________ bones. Choice Explanation a. Flat Incorrect. Flat bones protect organs like the skull and ribs but do not surround the spinal cord. b. Irregular Correct. Vertebrae surrounding the spinal cord are irregular bones due to their complex shapes. c. Short Incorrect. Short bones are small and cube-like, such as carpals, not surrounding the spinal cord. d. Sesamoid Incorrect. Sesamoid bones form within tendons, not around the spinal cord. 10. What is the classification of bones labeled A and B? D312 Lab Week 2 – Comparative Study of Prokaryotic and Eukaryotic Cells Choice Explanation a. Long bones Correct. Includes humerus, radius, ulna, femur, etc., which are characterized by their length and structure. b. Flat bones Incorrect. Flat bones include skull bones, ribs, and scapula but not bones labeled A and B in this image. c. Irregular bones Incorrect. Irregular bones have unique shapes like vertebrae, not represented by A and B. d. Short bones Incorrect. Short bones include carpals and tarsals, not A and B in this context. 11. What is part of the axial skeleton? Choice Explanation a. Thigh bones Incorrect. Thigh bones (femur) belong to the appendicular skeleton (limbs). b. Vertebral column Correct. The axial skeleton consists of the skull, vertebral column, and thoracic cage. c. Foot bones Incorrect. Foot bones are part of the appendicular skeleton. d. Shoulder bones Incorrect. Shoulder bones belong to the appendicular skeleton. 12. The appendicular skeleton ________. Choice Explanation a. forms the vertical axis of the body Incorrect. The axial skeleton forms the vertical axis, not the appendicular. b. includes all bones of the body trunk and limbs Incorrect. The trunk bones belong to the axial skeleton; appendicular includes limbs only. c. consists of 126 bones Correct. The appendicular skeleton includes 126 bones of the upper and lower limbs. d. is comprised of the bones of the lower and upper limbs Correct, but since c is more specific with bone count, c is the best choice here. References Marieb, E. N., & Hoehn, K. (2019). Human Anatomy & Physiology (11th ed.). Pearson.Tortora, G. J., & Derrickson, B. (2017). Principles of Anatomy and Physiology (15th ed.). Wiley.Kumar, V., Abbas, A. K., & Aster, J. C. (2020). Robbins Basic Pathology (10th ed.). Elsevier.

Student Name Western Governors University D312 Anatomy and Physiology I with Lab Prof. Name Date D312: Anatomy and Physiology I with Lab Lab Questions Section 3 – Skeletal Anatomy and Structure of Bones and Bones of the Head and Neck This section addresses key questions related to bone anatomy and physiology based on lab materials. Each question is followed by a detailed explanation of why each answer choice is correct or incorrect, enhancing understanding and retention of the skeletal system’s structure and function. 1. Which bone cells are entrapped in the bone matrix? Answer Choices: Choice Explanation a. Osteoclast cells Incorrect. Osteoclasts are large, multinucleated cells responsible for bone resorption; they are not entrapped in the matrix but act on its surface. b. Osteogenic cells Incorrect. These are undifferentiated precursor cells located in the periosteum and endosteum, responsible for producing osteoblasts, not entrapped. c. Osteoblast cells Incorrect. Osteoblasts synthesize and deposit bone matrix but are not trapped within it; once trapped, they become osteocytes. d. Osteocyte cells Correct. Osteocytes are mature bone cells that originate from osteoblasts trapped in the bone matrix; they maintain the bone tissue. Explanation:Osteocytes are the only bone cells permanently encased within the mineralized bone matrix. They originate from osteoblasts that secrete the matrix and subsequently become embedded, differentiating into osteocytes, which maintain bone tissue and communicate with other bone cells through canaliculi. 2-5. Label the components of the bone matrix. No further explanation is needed for these labeling questions. 6. Which statement is true about the diaphysis labeled D in the long bone diagram? Choice Explanation a. The diaphysis is comprised of compact bone and cartilage. Correct. The diaphysis mainly consists of compact bone for strength, while cartilage is found at growth plates near the epiphysis. b. The diaphysis is comprised mostly of compact bone. Partially correct but incomplete. It overlooks the presence of cartilage in growth plates adjacent to the diaphysis. c. The diaphysis is comprised of spongy bone and cartilage. Incorrect. Spongy bone is mainly found in the epiphyses, not in the diaphysis. d. The diaphysis is comprised mostly of spongy bone. Incorrect. Spongy bone is located in the ends of long bones, not the diaphysis. Explanation:The diaphysis, or shaft of a long bone, is primarily made of dense compact bone providing structural support and strength. Cartilage is present only in the epiphyseal (growth) plates at the ends where the diaphysis meets the epiphysis. 7. Which image is classified as an irregular-shaped bone? Choice Explanation a. A – Long bones Incorrect. Long bones are elongated and cylindrical, such as the femur or humerus. b. B – Sesamoid bone Incorrect. Sesamoid bones are small, embedded in tendons near joints, like the patella. c. C – Flat bones Incorrect. Flat bones are thin, with two layers of compact bone enclosing spongy bone, like the sternum. d. D – Irregular bones Correct. Irregular bones have complex shapes, such as vertebrae, sphenoid, and ethmoid bones. 8. Which type of bone is labeled A? Choice Explanation a. Irregular bones Incorrect. These bones have complex, varied shapes, unlike the bone labeled A. b. Short bones Incorrect. Short bones are roughly cube-shaped, like carpals and tarsals. c. Long bones Correct. Long bones have a long shaft and expanded ends, composed mainly of compact bone with spongy bone inside. d. Flat bones Incorrect. Flat bones are thin and flat, like the ribs and skull bones. 9. Bones that surround the spinal cord are classified as ________ bones. Choice Explanation a. Flat Incorrect. Flat bones include ribs and skull bones, not the spinal cord surround. b. Irregular Correct. Vertebrae are irregular bones due to their complex shapes tailored to protect the spinal cord. c. Short Incorrect. Short bones are found in wrists and ankles, not in the vertebral column. d. Sesamoid Incorrect. Sesamoid bones are small and embedded in tendons, not related to spinal protection. 10. What is the classification of bones labeled A and B in the human skeleton image? Choice Explanation a. Long bone Correct. Bones such as the humerus, radius, femur, and phalanges fall under this category. b. Flat bone Incorrect. Flat bones include the sternum and skull bones. c. Irregular bone Incorrect. Irregular bones include the vertebrae and sphenoid. d. Short bone Incorrect. Short bones are carpals and tarsals. 11. What is part of the axial skeleton? Choice Explanation a. Thigh bones Incorrect. Thigh bones are part of the appendicular skeleton (limbs). b. Vertebral column Correct. The axial skeleton consists of bones forming the head, neck, and trunk, including the vertebral column. c. Foot bones Incorrect. Foot bones are part of the appendicular skeleton. d. Shoulder bones Incorrect. Shoulder bones belong to the appendicular skeleton. 12. The appendicular skeleton ________. Choice Explanation a. forms the vertical axis of the body Incorrect. The axial skeleton forms the vertical axis. b. includes all bones of the body trunk and limbs Incorrect. The axial skeleton includes the trunk, not the appendicular. c. consists of 126 bones Correct. The appendicular skeleton includes 126 bones of the upper and lower limbs. d. is comprised of the bones of the lower and upper limbs Correct. The appendicular skeleton comprises the limbs’ bones and their girdles. Summary Table of Bone Classifications Bone Type Description Examples Long Bones Longer than wide, cylindrical shafts, mostly compact bone Femur, humerus, radius Short Bones Cube-shaped, mostly spongy bone surrounded by thin compact bone Carpals, tarsals Flat Bones Thin, flat, two layers of compact bone with spongy bone between Sternum, ribs, skull bones Irregular Bones Complex shapes tailored for specific functions Vertebrae, sphenoid, ethmoid Sesamoid Bones Small, embedded within tendons, protect tendons Patella References Martini, F. H., Nath, J. L., & Bartholomew, E. F. (2017). Fundamentals of Anatomy & Physiology (11th ed.). Pearson. D312 Section 3 Lab Questions on Skeletal Anatomy and Structure Tortora, G. J., & Derrickson, B. (2017). Principles of Anatomy and Physiology (15th ed.). Wiley. Saladin, K. S. (2020). Anatomy & Physiology: The Unity of Form and Function (9th ed.). McGraw-Hill Education.

Student Name Western Governors University D312 Anatomy and Physiology I with Lab Prof. Name Date D312: Anatomy and Physiology I with Lab Lab Questions – Section 5: Nervous System These lab questions focus on the anatomy and physiology of the nervous system. Each question includes not only the correct answer but also a detailed explanation of why it is correct and why other options are incorrect. For visual and matching questions, explanations are also provided to enhance conceptual understanding and retention. 1. Which structures are part of the central nervous system? Question: Select three answers. Options Explanation a. Somatic nerves Incorrect – Somatic nerves are part of the peripheral nervous system (PNS), not the central nervous system (CNS). b. Medulla oblongata Correct – The medulla oblongata is located in the brainstem and is part of the CNS, responsible for autonomic functions such as breathing and heart rate. c. Pons Correct – The pons is another brainstem structure within the CNS that acts as a communication bridge between different regions of the brain. d. Spinal cord Correct – The spinal cord is a major CNS component, transmitting signals between the brain and the body. Answer: Medulla oblongata, pons, and spinal cord are part of the central nervous system. 2–5. Parts of a Neuron Directions: Match each labeled part of the neuron with its correct name. Label Neuron Part Description A Terminal arborizations The terminal arborizations are the branching ends of an axon, which form synaptic connections with other neurons, muscles, or glands through synaptic knobs. B Axon The axon is a single, elongated process that carries electrical impulses away from the soma to other cells. C Soma Also known as the cell body, the soma contains the nucleus and cytoplasmic organelles essential for neuron metabolism. D Dendrites Dendrites are short, branching projections that receive incoming signals from other neurons and transmit them toward the soma. 6. Which part of a neuron carries information to other neurons, muscles, glands, or lymphatic tissue? Option Explanation a. Axon Correct – The axon transmits nerve impulses away from the soma to other neurons or effectors, functioning as the communication line of the neuron. b. Soma Incorrect – Although the soma integrates incoming signals, it does not transmit information to other cells. c. Cell body Incorrect – Another term for the soma, which performs metabolic activities but does not send signals outward. d. Dendrites Incorrect – Dendrites receive signals but do not carry them to other neurons or tissues. Answer: Axon 7–8. Cerebrum Labeling (No explanation required) 9–12. Lobes of the Cerebrum and Their Roles Question Function Correct Lobe Explanation 9. Which lobe is responsible for motor speech production, cognitive thought, and planning? Executive functions, speech motor control Frontal lobe (C) The frontal lobe houses Broca’s area and governs voluntary movement, reasoning, and planning. 10. Which lobe contains sensory association and body orientation? Sensory integration, spatial awareness Parietal lobe (B) The parietal lobe processes tactile input and spatial information via the postcentral gyrus. 11. Which lobe interprets visual information? Visual processing Occipital lobe (A) Contains the primary and associative visual areas for interpreting visual stimuli. 12. Which lobe manages hearing, smell, emotion, learning, and memory? Auditory and olfactory processing, memory Temporal lobe (D) Includes Wernicke’s area and hippocampal regions vital for auditory comprehension and memory. 13. Which arteries supply the brain? Answer: Bilateral internal carotid arteries and bilateral vertebral arteries.(No explanation needed) 14. What is the only source of energy for the brain? Answer: Glucose(No explanation needed) 15. Which substances can pass through the blood-brain barrier? Answer: Alcohol, anesthetics, and glucose(No explanation needed) 16. Which structure produces cerebrospinal fluid (CSF)? Option Explanation a. Dural sinuses Incorrect – Drain venous blood but do not secrete CSF. b. Choroid plexus Correct – A specialized vascular structure located in brain ventricles that produces and secretes cerebrospinal fluid. c. Meninges Incorrect – Protective layers surrounding the brain and spinal cord, but not responsible for CSF production. d. Pia mater Incorrect – The delicate inner meningeal layer; it closely adheres to brain tissue but does not produce CSF. Answer: Choroid plexus 17. Where is gray matter located in the spinal cord? Option Explanation a. Dorsal horn Correct – The dorsal horn is a region of gray matter that processes incoming sensory signals from peripheral nerves. b. Dorsal column Incorrect – Refers to white matter tracts carrying sensory input to the brain. c. Ventral column Incorrect – A region of gray matter involved in motor output, not primarily sensory processing. d. Central canal Incorrect – A fluid-filled space, not part of gray matter. Answer: Dorsal horn 18. Electrical Synapses or Gap Junctions Answer: Cardiac muscle and smooth muscle (No explanation needed) 19. Which term describes a bundle of axons in the peripheral nervous system? Option Explanation a. Ganglion Incorrect – Refers to a group of neuron cell bodies in the PNS. b. Nerve Correct – Nerves are bundles of axons in the PNS that connect to the CNS via cranial or spinal roots. c. Tract Incorrect – Refers to a similar structure but within the CNS. d. Nucleus Incorrect – A collection of neuron cell bodies within the CNS. Answer: Nerve 20. Which type of glial cell acts as the resident macrophage behind the blood-brain barrier? Option Explanation a. Astrocyte Incorrect – Supports neurons and regulates the blood-brain barrier but is not a macrophage. b. Schwann cell Incorrect – Found in the PNS, not within the BBB. c. Microglia Correct – These are immune cells that act as macrophages within the CNS, clearing debris and pathogens. d. Satellite cell Incorrect – Found in PNS ganglia, supporting neuron cell bodies. Answer: Microglia 21. What is a neural synapse? Option Explanation a. A central cavity within the brain where CSF is produced Incorrect – This describes a ventricle. b. A group of neuron cell bodies in the periphery Incorrect – This refers to a ganglion. c. A specialized junction mediating communication between neurons Correct – The synapse transmits electrical or chemical signals between neurons, enabling neural communication. d. A bundle of axons in the CNS Incorrect – This describes a neural tract. Answer: A specialized junction mediating the transfer of information

Student Name Western Governors University D312 Anatomy and Physiology I with Lab Prof. Name Date Anatomy and Physiology Comprehensive Review Question 1 Which of the following is considered one of the essential characteristics of life?a. Cognitionb. Self-awarenessc. Perceptiond. Metabolism Answer: d. Metabolism Metabolism is a fundamental process that sustains all living organisms by converting nutrients into energy necessary for growth, repair, and maintenance of body functions. This process involves both anabolic (building up) and catabolic (breaking down) reactions, ensuring cellular and systemic balance (Tortora & Derrickson, 2022). Question 2 Which system of the body is responsible for initiating immune responses?a. Cardiovascularb. Endocrinec. Lymphaticd. Respiratory Answer: c. Lymphatic The lymphatic system plays a vital role in defending the body against infection by producing lymphocytes and filtering harmful substances. It complements the circulatory system and includes lymph nodes, spleen, thymus, and lymph vessels that collectively maintain immunity and fluid balance (Marieb & Hoehn, 2019). Question 3 Which statement is true of homeostatic mechanisms?a. They help keep the body’s internal environment consistent.b. They occur only when a body is in optimal condition.c. They are generally a result of severe malnourishment.d. They are most likely to occur in people who are comatose. Answer: a. They help keep the body’s internal environment consistent. Homeostasis refers to the body’s ability to maintain a stable internal condition despite external changes. It involves feedback systems—primarily negative feedback loops—that regulate variables like temperature, pH, and glucose levels to ensure survival (Guyton & Hall, 2020). Question 4 An ionic bond will form when two ions have what relationship to each other?a. One neutral atom, one positively chargedb. Electrically neutralc. Oppositely chargedd. Similarly charged Answer: c. Oppositely charged Ionic bonds form when positively charged (cation) and negatively charged (anion) ions attract one another. This type of bonding creates stable compounds like sodium chloride (NaCl), crucial for various physiological processes (Timberlake, 2020). Question 5 Which of the following is a substance that, when added to a chemical solution, prevents large changes in the pH of the solution?a. Binderb. Bufferc. Effectord. Transmitter Answer: b. Buffer Buffers are essential in maintaining pH balance within the body. For instance, the bicarbonate buffer system stabilizes blood pH by neutralizing excess acids or bases, ensuring proper enzymatic function and metabolic activity (Campbell et al., 2021). Question 6 Which type of chemical bond features an unequal sharing of electrons between two atoms, resulting in slight positive and negative charges?a. Hydrogenb. Ionicc. Nonpolar covalentd. Polar covalent Answer: d. Polar covalent A polar covalent bond occurs when atoms share electrons unequally, creating dipoles with partial positive and negative ends. This property gives molecules like water their unique solvent characteristics (Reece et al., 2020). Question 7 Which of the following reactions is a major buffer in bodily fluids?(Carbonic acid-bicarbonate reaction) Answer: Carbonic acid–bicarbonate buffer system This system regulates blood pH through reversible reactions between carbon dioxide and water, forming carbonic acid, which dissociates into bicarbonate and hydrogen ions. This reaction stabilizes blood pH around 7.4 (Guyton & Hall, 2020). Question 8 Inorganic chemistry generally deals with substances that do not contain:a. Carbonb. Glucosec. Oxygend. Sodium Answer: a. Carbon Inorganic chemistry studies compounds lacking carbon-hydrogen bonds, including salts, metals, and minerals—many of which are vital in body processes such as nerve transmission and muscle contraction (Timberlake, 2020). Question 9 What organelle is continuous with an animal cell’s outer nuclear membrane?a. Endoplasmic reticulumb. Golgi apparatusc. Lysosomed. Ribosome Answer: a. Endoplasmic reticulum The endoplasmic reticulum (ER) connects directly with the nuclear envelope, allowing communication and transport of materials like proteins and lipids between the nucleus and cytoplasm (Alberts et al., 2022). Question 10 Which of the following structural features of the plasma membrane results from the unequal distribution of ions inside and outside the cell?a. Fluid natureb. Membrane potentialc. Polar head group with a nonpolar taild. Stabilization by cholesterol molecules Answer: b. Membrane potential The plasma membrane maintains an electrical potential difference due to varying ion concentrations, crucial for nerve impulse transmission and muscle contraction (Marieb & Hoehn, 2019). Question 11 What organelle is responsible for protein and lipid modification, packaging, and distribution throughout the cell?a. Golgi apparatusb. Lysosomec. Mitochondriond. Proteasome Answer: a. Golgi apparatus The Golgi apparatus modifies, packages, and distributes proteins and lipids synthesized by the ER. It forms vesicles that transport materials to their target destinations (Alberts et al., 2022). Question 12 The four characteristic functions of a cell are metabolism, synthesis, communication, and which of the following?a. Anaerobic respirationb. Hydrationc. Osmosisd. Reproduction Answer: d. Reproduction Cell reproduction ensures growth, tissue repair, and species continuity. Through mitosis, cells divide to produce genetically identical copies (Tortora & Derrickson, 2022). D312 Final Exam Review Practice Questions and Answers Question 13 Which of the following provides energy for cellular respiration?a. PKUb. ATPc. DNAd. RNA Answer: b. ATP Adenosine triphosphate (ATP) acts as the primary energy currency of the cell, storing and transferring energy required for metabolic reactions (Marieb & Hoehn, 2019). Question 14 When adenosine diphosphate (ADP) gains an inorganic phosphate group, it becomes:a. ATPb. AMPc. RNAd. TEM Answer: a. ATP The phosphorylation of ADP to ATP stores energy derived from nutrient breakdown, which is later used for cellular processes such as muscle contraction and active transport (Reece et al., 2020). Question 15 At what stage of the menstrual cycle do LH levels begin to increase?a. Mensesb. Ovulationc. Proliferative phased. Secretory phase Answer: b. Ovulation Luteinizing hormone (LH) surges during ovulation, triggering the release of an egg from the ovary. This marks the midpoint of the menstrual cycle (Hall, 2021). Question 16 The walls of the intestines and stomach are composed of which type of muscle tissue?a. Cardiacb. Skeletalc. Smoothd. Synergistic Answer: c. Smooth Smooth muscle tissue lines hollow organs like the stomach and intestines, contracting involuntarily to move substances through the digestive tract (Tortora & Derrickson, 2022). Question 17 Starting from the surface and moving inward, what are the layers of the integumentary system?a. Dermis, epidermis, hypodermisb. Epidermis, dermis, hypodermisc. Epidermis, hypodermis, dermisd. Hypodermis, dermis, epidermis Answer: b. Epidermis, dermis, hypodermis The skin comprises three layers: the epidermis (outer layer), dermis (middle connective layer), and hypodermis (subcutaneous fat layer). Skin Layer Function Epidermis Protection and