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Orientation & Terminology Q1. The femur is ______ to the skin of the thigh. (. ✅ Explanation: ) Deep The femur lies beneath layers of muscle and connective tissue, farther from the surface of the body. 🩻 Diagram: Cross-section of thigh showing skin → muscle → bone (femur).
Q2. Which body plane divides the body into right and left halves? (. ✅ Explanation: ) Sagittal (midsagittal) plane The midsagittal plane runs vertically, dividing the body into equal right and left sides. 🩻 Diagram: Three body planes—sagittal, frontal, transverse.
Q3. The heart is located ______ to the lungs. (. ✅ Explanation: ) Medial The heart lies between the lungs in the mediastinum.
Q4. Which cavity contains the lungs? (. ✅ Explanation: ) Pleural cavity Each lung is surrounded by its own pleural cavity within the thoracic cavity.
Q5.
The elbow is ______ to the wrist. (. ✅ Explanation: ) Proximal The elbow is closer to the point of attachment (shoulder) than the wrist is.
Q6. Which term describes the body in its standard reference position? (. ✅ Explanation: ) Anatomical position Standing upright, facing forward, arms at sides, palms forward, feet flat. 🩻 Diagram: Full-body front and side view in anatomical position. Q7. Which membrane lines the walls of the abdominal cavity? (. ✅ Explanation: ) Parietal peritoneum The parietal layer lines the cavity wall; the visceral layer covers the organs. 🩻 Diagram: Abdominopelvic cavity with parietal vs visceral peritoneum labeled. Q8. A plane dividing the body into superior and inferior parts is the ______ plane. (. ✅ Explanation: ) Transverse (horizontal) plane A horizontal plane divides the body into top (superior) and bottom (inferior) portions. Q9. Which directional term means “toward the head”? (. ✅ Explanation: ) Superior (cranial) Superior refers to a position above or closer to the head.
Q10. Which feedback mechanism reinforces a change until an endpoint is reached (e.g., childbirth)?
(. ✅ Explanation: ) Nucleus The nucleus houses DNA, which directs protein synthesis and cell function. 🩻 Diagram: Eukaryotic cell showing nucleus, nucleolus, nuclear envelope. Q15. What is the main function of ribosomes? (. ✅ Explanation: ) Protein synthesis Ribosomes link amino acids together to form proteins, either free in cytoplasm or attached to rough ER. 🩻 Diagram: Ribosome translating mRNA into a polypeptide chain.
Q16. Which solution will cause a red blood cell to swell and possibly burst? (. ✅ Explanation: ) Hypotonic solution Water moves into the cell when the extracellular fluid has lower solute concentration than cytoplasm. 🩻 Diagram: RBCs in isotonic, hypotonic, and hypertonic solutions.
Q17. Which type of tissue covers body surfaces and lines body cavities? (. ✅ Explanation: ) Epithelial tissue Epithelia form protective layers and are specialized for absorption, secretion, and filtration 🩻 Diagram:. Simple squamous, cuboidal, and columnar epithelium illustrations.
Q18. Which connective tissue type stores triglycerides for energy? (. ✅ Explanation: ) Adipose tissue Adipocytes store fat, providing insulation and energy reserves. 🩻 Diagram: Loose connective tissue with adipocytes shown. Q19. Which muscle type is involuntary and found in hollow organs?
(. ✅ Explanation: ) Smooth muscle Smooth muscle controls movement in organs like the stomach, intestines, and blood vessels. 🩻 Diagram: Comparison of skeletal, cardiac, and smooth muscle fibers.
Q20. Which tissue type can conduct electrical impulses? (. ✅ Explanation: ) Nervous tissue Neurons transmit signals through electrical and chemical means; neuroglia support 🩻 Diagram: them. Neuron structure showing dendrites, soma, and axon.
Would you like me to continue with format with answers, explanations, and diagram c Questions 21– ues)? 30: The Skeletal System next (same instructor-style You said: YES Canva said: Excellent ✅ Here’s the next portion of your Instructor/Study Key Version — BIOL 251 now covering the – Human Anatomy & Physiology I (Module 1 Review) Skeletal System (Q21–Q30).
🦴 Section 3 : Skeletal System (Q 21 – Q 30 ) Q21. What are the main functions of the skeletal system? (. ✅ Explanation: ) Support, protection, movement, storage, and blood cell formation The skeleton provides structure, shields organs, enables motion with muscles, stores minerals (calcium, phosphorus), and produces blood cells in marrow. 🩻 Diagram: Skeleton highlighting support (spine), protection (ribs), and hematopoiesis (bone marrow). Q22. Which type of bone is dense and found on the outer surface of bones?
Where is red bone marrow primarily located in adults? (. ✅ Explanation: ) Spongy bone of fl In adults, red marrow is found in the sternum, ribs, skull, pelvis, and the ends of at bones and epiphyses of long bones humerus and femur. 🩻 Diagram: Skeleton highlighting red and yellow marrow regions.
Q28. Which type of joint allows free movement in many directions? (. ✅ Explanation: ) Synovial joint Synovial joints (like the shoulder and knee) contain a fluid-filled capsule permitting movement. 🩻 Diagram: Synovial joint structure (articular cartilage, synovial cavity, capsule).
Q29. What is the name of the first cervical vertebra that supports the skull? (. ✅ Explanation: ) Atlas (C1) The atlas supports the head and articulates with the occipital condyles of the skull, allowing “yes” motion. 🩻 Diagram: Cervical vertebrae showing atlas (C 1 ) and axis (C 2 ).
Q30. Which bones make up the axial skeleton? (. ✅ Explanation: ) Skull, vertebral column, ribs, sternum The axial skeleton forms the central axis of the body and protects the brain, spinal cord, and thoracic organs. 🩻 Diagram: Skeleton color-coded—axial (blue) vs appendicular (yellow).
Would you like me to continue with diagram style)? Questions 31–40: Muscular System next (same answer-and- You said: YES Canva said: Excellent 💪
Here’s the next part of your Instructor/Study Key Version BIOL 251 – Muscular System (Q31 – Human Anatomy & Physiology I (Module 1 Review)–Q40) Each question includes the correct answer ✅, an explanation ., and diagram references 🩻. 💪 Section 4 : Muscular System (Q 31 – Q 40 ) Q31. What is the primary function of the muscular system? (. ✅ Explanation: ) Movement, posture maintenance, heat production Skeletal muscles contract to move the skeleton, stabilize posture, and generate heat during activity. 🩻 Diagram: Human body with major skeletal muscles labeled.
Q32. Which type of muscle tissue is striated and voluntary? (. ✅ Explanation: ) Skeletal muscle Skeletal muscle fibers are long, multinucleated, and under conscious control. 🩻 Diagram: Microscopic image of skeletal muscle showing striations and multiple nuclei. Q33. Which type of muscle tissue is striated but involuntary? (. ✅ Explanation: ) Cardiac muscle Found only in the heart, cardiac muscle cells are branched, striated, and conne 🩻 Diagram: cted by intercalated discs. Cardiac tissue with intercalated discs highlighted.
Q34. Which type of muscle tissue lacks striations and is involuntary? (. ✅ Explanation: ) Smooth muscle Smooth muscle cells are spindle-shaped and control involuntary movements in hollow organs. 🩻 Diagram: Smooth muscle tissue under microscope.
initiating depolarization. 🩻 Diagram: Synaptic transmission of ACh at NMJ.
Q40. What causes muscle fatigue during intense activity? (. ✅ Explanation: ) Depletion of ATP and accumulation of lact Prolonged activity without sufficient oxygen shifts metabolism to anaerobic ic acid respiration, leading to lactic acid buildup. 🩻 Diagram: Graph of muscle performance vs fatigue with ATP depletion.
⚡ Section 5: Nervous System (Q41–Q50) Q41. What is the main function of the nervous system? (. ✅ Explanation: ) To receive, integrate, and respond to information The nervous system detects stimuli, processes information, and triggers appropriate responses to 🩻 Diagram: Flowchart showing sensory input maintain homeostasis. → integration → motor output.
Q42. The structural and functional unit of the nervous system is the: (. ✅ Explanation: ) Neuron Neurons transmit electrical impulses; they consist of a cell body, dendrites, and an axon. 🩻 Diagram: Labeled neuron with dendrites, axon, synaptic terminals.
Q43. Which glial cells produce myelin in the central nervous system (CNS)? (. ✅ Explanation: ) Oligodendrocytes Oligodendrocytes wrap around axons in the CNS to form the myelin sheath, which speeds impulse conduction. 🩻 Diagram: Cross-section of axon showing myelin sheath formed by oligodendrocyte.
Q4 Which part of the neuron receives incoming signals? 4. (. ✅ Explanation: ) Dendrites Dendrites are branched extensions that receive signals from other neurons and transmit them toward the soma. 🩻 Diagram: Neuron with labeled dendrites and soma.
Q45. Which ion movement is primarily responsible for depolarization of the neuron membrane? (. ✅ Explanation: ) Influx of sodium (Na⁺) During depolarization, voltage-gated sodium channels open, allowing Na⁺ to enter and make the i 🩻 Diagram: Action potential curve labeling depolarization and Nanside more positive. ⁺ influx.
Q46. The junction between two neurons is called a: (. ✅ Explanation: ) Synapse A synapse is the site of communication between neurons via neurotransmitters or electrical signals. 🩻 Diagram: Synapse labeled with presynaptic neuron, synaptic cleft, postsynaptic membrane.
Q47. Which lobe of the cerebrum is responsible for voluntary motor control? (. ✅ Explanation: ) Frontal lobe The frontal lobe houses the primary motor cortex, which initiates voluntary movement. 🩻 Diagram: Brain labeled with frontal, parietal, temporal, occipital lobes.
Q48. Which part of the brain regulates heart rate, blood pressure, and respiration? (. ✅ Explanation: ) Medulla oblongata The medulla contains vital autonomic centers that control cardiac and respiratory
(. ✅ Explanation: ) To transport oxygen, nutrients, hormones, and wastes The heart pumps blood through vessels, maintaining circulation to sustain cellular through the blood activity. 🩻 Diagram: Circulatory system with heart, arteries, veins, capillaries.
Q52. Which chamber of the heart receives oxygen-poor blood from the body? (. ✅ Explanation: ) Right atrium The right atrium collects deoxygenated blood from the superior and inferior vena cava. 🩻 Diagram: Heart chambers labeled (RA, RV, LA, LV).
Q53. Which valve prevents backflow of blood from the right ventricle to the right atrium? (. ✅ Explanation: ) Tricuspid valve The tricuspid valve ensures one-way flow of blood during ventricular contraction. 🩻 Diagram: Heart valves labeled (tricuspid, pulmonary, mitral, aortic). Q54. Blood in the pulmonary arteries is: (. ✅ Explanation: ) Low in oxygen and high in carbon dioxide Pulmonary arteries carry deoxygenated blood from the right ventricle to the lungs for gas exchange. 🩻 Diagram: Pulmonary circulation flow arrows (blue for deoxygenated, red for oxygenated).
Q55. Which blood vessels carry blood away from the heart? (. ✅ Explanatio ) Arteriesn: Arteries always carry blood away from the heart, regardless of oxygen content. 🩻 Diagram: Arterial vs venous flow diagram. Q56. Which part of the blood is responsible for oxygen transport?
(. ✅ Explanation: ) Red blood cells (erythrocytes) RBCs contain hemoglobin, a protein that binds and carries oxygen molecules. 🩻 Diagram: Blood composition: plasma, RBCs, WBCs, platelets. Q57. What is the main function of the respiratory system? (. ✅ Explanation: ) To exchange oxygen and carbon dioxide between the air and blood The lungs provide a surface for gas exchange between alveoli and pulmonary capillaries. 🩻 Diagram: Respiratory tract showing nasal cavity, trachea, bronchi, alveoli.
Q58. Which structure is the site of gas exchange in the lungs? (. ✅ Explanation: ) Alveoli Alveoli are thin-walled sacs where oxygen diffuses into blood and CO₂ diffuses out. 🩻 Diagram: Alveolar structure with capillary network.
Q59. During inhalation, the diaphragm: (. ✅ Explanation: ) Contracts and moves downward The diaphragm’s contraction increases thoracic volume, decreasing pressure and drawing air in. 🩻 Diagram: Mechanics of inhalation and exhalation.
Q60. Which part of the brain controls the basic rhythm of breathing? (. ✅ Explanation: ) Medulla oblongata The medulla contains the respiratory centers that automatically regulate breathing rate and depth. 🩻 Diagram: Brainstem labeled with respiratory control centers.
digestion. 🩻 Diagram: Liver, gallbladder, and bile duct system.
Q64. Which enzyme begins the chemical digestion of carbohydrates? (. ✅ Explanation: ) Salivary amylase Salivary amylase, produced by salivary glands, starts breaking down starch in the mouth. 🩻 Diagram: Mouth and salivary glands labeled with enzyme secretion.
Q65. Which organ filters blood to remove wastes and regulate fluid balance? (. ✅ Explanation: ) Kidneys Kidneys filter blood plasma, reabsorb essential substances, and form urine. 🩻 Diagram: Urinary system showing kidneys, ureters, bladder, urethra. Q66. What is the functional unit of the kidney? (. ✅ Explanation: ) Nephron Each nephron filters blood, reabsorbs water and solutes, and secretes wastes to form urine. 🩻 Diagram: Nephron labeled: glomerulus, Bowman’s capsule, tubules, collecting duct.
Q67. Which hormone increases water reabsorption in the kidneys? (. ✅ Explanation: ) Antidiuretic hormone (ADH) ADH (from the posterior pituitary) acts on the collecting ducts to retain water, reducing urine output. 🩻 Diagram: ADH feedback loop controlling water balance.
Q68. Which gland is considered the “master gland” of the endocrine system?
(. ✅ Explanation: ) Pituitary gland The pituitary releases hormones that control other glands such as the thyroid, adrenals, and gona 🩻 Diagram: Endocrine glands labeled with pituitaryds. -hypothalamic connection.
Q69. Which hormone regulates blood glucose by lowering its concentration? (. ✅ Explanation: ) Insulin Insulin, secreted by pancreatic beta cells, promotes glucose uptake into cells, reducing blood sugar levels. 🩻 Diagram: Glucose-insulin feedback regulation.
Q70. Which endocrine glands sit atop the kidneys and help manage stress? (. ✅ Exp ) Adrenal glandslanation: The adrenal cortex produces cortisol (stress hormone), while the medulla secretes epinephrine and norepinephrine. 🩻 Diagram: Adrenal glands on kidneys labeled cortex vs medulla.
