BIOD 152 Anatomy And Physiology II -
Complete Modules 1-7 Revision | All
Questions And Solutions (Rationales) | Exam
Prep Q&A 2026/2027
1. A student examines a tissue sample and observes a single layer of flattened cells lining
the inside of a blood vessel. Which epithelial tissue is most likely present?
A. Simple cuboidal epithelium
B. Simple squamous epithelium
C. Stratified squamous epithelium
D. Pseudostratified columnar epithelium
Rationale: Simple squamous epithelium consists of a single layer of thin, flattened cells that
facilitates diffusion and filtration. It forms the endothelium lining blood vessels, allowing
efficient exchange between blood and surrounding tissues.
2. During a physiology laboratory, a student places red blood cells in a solution with a
lower solute concentration than the intracellular fluid. What is the most likely outcome?
A. Water leaves the cells, causing them to shrink.
B. No net water movement occurs.
C. Solutes move into the cells until they become rigid.
D. Water enters the cells, potentially causing hemolysis.
Rationale: The solution is hypotonic relative to the red blood cells. Water moves into the cells
by osmosis, causing them to swell and potentially rupture. This process is called hemolysis.
3. A patient experiences muscle weakness after a condition disrupts the movement of
calcium ions from the sarcoplasmic reticulum into the cytoplasm of skeletal muscle cells.
Which physiological process is most directly impaired?
A. Initiation of muscle contraction
B. Production of acetylcholine in the motor neuron
C. Transmission of oxygen by hemoglobin
D. Formation of myelin around motor neurons
Rationale: Calcium released from the sarcoplasmic reticulum binds to troponin, shifting
tropomyosin away from actin's myosin-binding sites. Without adequate calcium release,
effective cross-bridge formation and skeletal muscle contraction are impaired.
,4. A laboratory technician accidentally damages the plasma membrane of a cell. Which
function would be most directly compromised?
A. Storage of genetic information in DNA
B. Production of ribosomal RNA in the nucleolus
C. Regulation of substances entering and leaving the cell
D. Packaging of proteins in the Golgi apparatus
Rationale: The plasma membrane forms a selectively permeable boundary around the cell. Its
phospholipid bilayer and membrane proteins regulate transport, maintain electrochemical
gradients, and support cell signaling. Damage can disrupt cellular homeostasis.
5. A patient has a deficiency of thyroid hormone. Which change would most likely occur in
response to reduced thyroid hormone activity?
A. Increased basal metabolic rate
B. Reduced basal metabolic rate
C. Increased calcium absorption caused directly by calcitonin
D. Increased oxygen consumption by all tissues
Rationale: Thyroid hormones, particularly T3 and T4, help regulate metabolic activity, heat
production, and oxygen consumption. Reduced thyroid hormone levels generally decrease
basal metabolic rate and may cause fatigue, cold intolerance, and weight gain.
6. A tissue specimen contains cells embedded in an extracellular matrix rich in collagen
fibers. The tissue provides structural support and connects one body structure to another.
Which tissue category does it represent?
A. Epithelial tissue
B. Nervous tissue
C. Muscle tissue
D. Connective tissue
Rationale: Connective tissue is characterized by cells distributed within an extracellular matrix
containing varying amounts of ground substance and fibers. Collagen provides tensile
strength, making this tissue suitable for support, binding, and protection.
7. A patient sustains damage to the myelin surrounding peripheral motor neurons. Which
consequence is most likely?
A. Faster transmission of nerve impulses
B. Increased production of neurotransmitters by the thyroid gland
C. Slower conduction of action potentials along affected axons
D. Permanent prevention of all action potentials in every neuron
,Rationale: Myelin electrically insulates axons and enables saltatory conduction between
nodes of Ranvier. Damage to peripheral myelin slows nerve impulse transmission and may
cause weakness, impaired coordination, or sensory disturbances. Complete conduction failure
is possible in severe cases but is not inevitable.
8. A student is asked to identify the structure responsible for synthesizing most cellular
ATP under aerobic conditions. Which organelle should the student select?
A. Mitochondrion
B. Lysosome
C. Golgi apparatus
D. Centriole
Rationale: Mitochondria contain the enzymes and electron transport machinery required for
oxidative phosphorylation. They produce most ATP in many aerobic eukaryotic cells, although
glycolysis and other ATP-producing reactions occur elsewhere.
9. A patient has a blood calcium concentration below the normal physiological range.
Which hormonal response would normally help restore calcium levels?
A. Reduced parathyroid hormone secretion
B. Increased insulin secretion
C. Increased calcitonin secretion
D. Increased parathyroid hormone secretion
Rationale: Low blood calcium stimulates parathyroid hormone secretion. PTH increases renal
calcium reabsorption, promotes activation of vitamin D to support intestinal calcium
absorption, and stimulates bone resorption indirectly when needed to restore extracellular
calcium.
10. A student touches a hot metal surface and withdraws the hand before consciously
recognizing the pain. Which explanation best describes this response?
A. The cerebral cortex initiates every component of the response before movement begins.
B. A spinal reflex pathway produces a rapid motor response while sensory information also
travels toward the brain.
C. The endocrine system releases thyroid hormone to activate the hand muscles.
D. The autonomic nervous system directly controls all skeletal muscle contraction.
Rationale: A withdrawal reflex is integrated primarily through neural circuits in the spinal
cord. Sensory input activates interneurons and motor neurons, allowing rapid withdrawal
before conscious pain perception is fully processed in the brain.
11. A patient has difficulty absorbing dietary fats after a disorder disrupts the normal
function of bile salts. Which digestive process is most directly affected?
, A. Protein denaturation by hydrochloric acid
B. Starch digestion by salivary amylase
C. Emulsification of fats and formation of micelles
D. Absorption of vitamin B12 through intrinsic factor
Rationale: Bile salts emulsify large fat droplets and help form micelles that transport lipid
digestion products toward the intestinal brush border. Impaired bile salt availability reduces
efficient fat digestion and absorption and can contribute to deficiencies of fat-soluble
vitamins A, D, E, and K.
12. During a cardiovascular assessment, a student identifies the valve located between the
left atrium and the left ventricle. Which valve is being assessed?
A. Mitral valve
B. Tricuspid valve
C. Pulmonary semilunar valve
D. Aortic semilunar valve
Rationale: The mitral, or bicuspid, valve lies between the left atrium and left ventricle. It
permits forward blood flow during ventricular filling and prevents significant backflow into
the left atrium during ventricular contraction.
13. A patient has severe dehydration after several days of vomiting and diarrhea. Which
renal response would most directly help conserve body water?
A. Decreased secretion of antidiuretic hormone
B. Increased urine production with low solute concentration
C. Reduced water permeability in the collecting ducts
D. Increased antidiuretic hormone activity in the collecting ducts
Rationale: Dehydration increases plasma osmolality and can reduce circulating blood volume,
stimulating antidiuretic hormone release. ADH promotes aquaporin insertion into collecting-
duct cells, increasing water reabsorption and producing a smaller volume of more
concentrated urine.
14. A patient with an injury to the cerebellum develops difficulty maintaining balance and
coordinating voluntary movements. Which function has been most directly affected?
A. Production of cerebrospinal fluid
B. Coordination and fine-tuning of movement
C. Regulation of blood glucose by insulin
D. Transmission of sound waves through the middle ear
Complete Modules 1-7 Revision | All
Questions And Solutions (Rationales) | Exam
Prep Q&A 2026/2027
1. A student examines a tissue sample and observes a single layer of flattened cells lining
the inside of a blood vessel. Which epithelial tissue is most likely present?
A. Simple cuboidal epithelium
B. Simple squamous epithelium
C. Stratified squamous epithelium
D. Pseudostratified columnar epithelium
Rationale: Simple squamous epithelium consists of a single layer of thin, flattened cells that
facilitates diffusion and filtration. It forms the endothelium lining blood vessels, allowing
efficient exchange between blood and surrounding tissues.
2. During a physiology laboratory, a student places red blood cells in a solution with a
lower solute concentration than the intracellular fluid. What is the most likely outcome?
A. Water leaves the cells, causing them to shrink.
B. No net water movement occurs.
C. Solutes move into the cells until they become rigid.
D. Water enters the cells, potentially causing hemolysis.
Rationale: The solution is hypotonic relative to the red blood cells. Water moves into the cells
by osmosis, causing them to swell and potentially rupture. This process is called hemolysis.
3. A patient experiences muscle weakness after a condition disrupts the movement of
calcium ions from the sarcoplasmic reticulum into the cytoplasm of skeletal muscle cells.
Which physiological process is most directly impaired?
A. Initiation of muscle contraction
B. Production of acetylcholine in the motor neuron
C. Transmission of oxygen by hemoglobin
D. Formation of myelin around motor neurons
Rationale: Calcium released from the sarcoplasmic reticulum binds to troponin, shifting
tropomyosin away from actin's myosin-binding sites. Without adequate calcium release,
effective cross-bridge formation and skeletal muscle contraction are impaired.
,4. A laboratory technician accidentally damages the plasma membrane of a cell. Which
function would be most directly compromised?
A. Storage of genetic information in DNA
B. Production of ribosomal RNA in the nucleolus
C. Regulation of substances entering and leaving the cell
D. Packaging of proteins in the Golgi apparatus
Rationale: The plasma membrane forms a selectively permeable boundary around the cell. Its
phospholipid bilayer and membrane proteins regulate transport, maintain electrochemical
gradients, and support cell signaling. Damage can disrupt cellular homeostasis.
5. A patient has a deficiency of thyroid hormone. Which change would most likely occur in
response to reduced thyroid hormone activity?
A. Increased basal metabolic rate
B. Reduced basal metabolic rate
C. Increased calcium absorption caused directly by calcitonin
D. Increased oxygen consumption by all tissues
Rationale: Thyroid hormones, particularly T3 and T4, help regulate metabolic activity, heat
production, and oxygen consumption. Reduced thyroid hormone levels generally decrease
basal metabolic rate and may cause fatigue, cold intolerance, and weight gain.
6. A tissue specimen contains cells embedded in an extracellular matrix rich in collagen
fibers. The tissue provides structural support and connects one body structure to another.
Which tissue category does it represent?
A. Epithelial tissue
B. Nervous tissue
C. Muscle tissue
D. Connective tissue
Rationale: Connective tissue is characterized by cells distributed within an extracellular matrix
containing varying amounts of ground substance and fibers. Collagen provides tensile
strength, making this tissue suitable for support, binding, and protection.
7. A patient sustains damage to the myelin surrounding peripheral motor neurons. Which
consequence is most likely?
A. Faster transmission of nerve impulses
B. Increased production of neurotransmitters by the thyroid gland
C. Slower conduction of action potentials along affected axons
D. Permanent prevention of all action potentials in every neuron
,Rationale: Myelin electrically insulates axons and enables saltatory conduction between
nodes of Ranvier. Damage to peripheral myelin slows nerve impulse transmission and may
cause weakness, impaired coordination, or sensory disturbances. Complete conduction failure
is possible in severe cases but is not inevitable.
8. A student is asked to identify the structure responsible for synthesizing most cellular
ATP under aerobic conditions. Which organelle should the student select?
A. Mitochondrion
B. Lysosome
C. Golgi apparatus
D. Centriole
Rationale: Mitochondria contain the enzymes and electron transport machinery required for
oxidative phosphorylation. They produce most ATP in many aerobic eukaryotic cells, although
glycolysis and other ATP-producing reactions occur elsewhere.
9. A patient has a blood calcium concentration below the normal physiological range.
Which hormonal response would normally help restore calcium levels?
A. Reduced parathyroid hormone secretion
B. Increased insulin secretion
C. Increased calcitonin secretion
D. Increased parathyroid hormone secretion
Rationale: Low blood calcium stimulates parathyroid hormone secretion. PTH increases renal
calcium reabsorption, promotes activation of vitamin D to support intestinal calcium
absorption, and stimulates bone resorption indirectly when needed to restore extracellular
calcium.
10. A student touches a hot metal surface and withdraws the hand before consciously
recognizing the pain. Which explanation best describes this response?
A. The cerebral cortex initiates every component of the response before movement begins.
B. A spinal reflex pathway produces a rapid motor response while sensory information also
travels toward the brain.
C. The endocrine system releases thyroid hormone to activate the hand muscles.
D. The autonomic nervous system directly controls all skeletal muscle contraction.
Rationale: A withdrawal reflex is integrated primarily through neural circuits in the spinal
cord. Sensory input activates interneurons and motor neurons, allowing rapid withdrawal
before conscious pain perception is fully processed in the brain.
11. A patient has difficulty absorbing dietary fats after a disorder disrupts the normal
function of bile salts. Which digestive process is most directly affected?
, A. Protein denaturation by hydrochloric acid
B. Starch digestion by salivary amylase
C. Emulsification of fats and formation of micelles
D. Absorption of vitamin B12 through intrinsic factor
Rationale: Bile salts emulsify large fat droplets and help form micelles that transport lipid
digestion products toward the intestinal brush border. Impaired bile salt availability reduces
efficient fat digestion and absorption and can contribute to deficiencies of fat-soluble
vitamins A, D, E, and K.
12. During a cardiovascular assessment, a student identifies the valve located between the
left atrium and the left ventricle. Which valve is being assessed?
A. Mitral valve
B. Tricuspid valve
C. Pulmonary semilunar valve
D. Aortic semilunar valve
Rationale: The mitral, or bicuspid, valve lies between the left atrium and left ventricle. It
permits forward blood flow during ventricular filling and prevents significant backflow into
the left atrium during ventricular contraction.
13. A patient has severe dehydration after several days of vomiting and diarrhea. Which
renal response would most directly help conserve body water?
A. Decreased secretion of antidiuretic hormone
B. Increased urine production with low solute concentration
C. Reduced water permeability in the collecting ducts
D. Increased antidiuretic hormone activity in the collecting ducts
Rationale: Dehydration increases plasma osmolality and can reduce circulating blood volume,
stimulating antidiuretic hormone release. ADH promotes aquaporin insertion into collecting-
duct cells, increasing water reabsorption and producing a smaller volume of more
concentrated urine.
14. A patient with an injury to the cerebellum develops difficulty maintaining balance and
coordinating voluntary movements. Which function has been most directly affected?
A. Production of cerebrospinal fluid
B. Coordination and fine-tuning of movement
C. Regulation of blood glucose by insulin
D. Transmission of sound waves through the middle ear
