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BIOD 151 – Essential Human Anatomy & Physiology I Final
Exam | Latest 2026 Edition | Comprehensive Exam Prep with
Practice Questions, Verified Answers & Detailed Rationales |
Instant PDF Download Available
1. A patient is standing in anatomical position and moves their hand to scratch
their nose. Which anatomical action term best describes the motion occurring
at their elbow joint?
A. Extension
B. Flexion
C. Abduction
D. Adduction
Correct Answer: B. Flexion
Rationale: Flexion is the movement that decreases the angle at a joint, such as
bending the elbow to bring the hand toward the face. Extension increases the
angle, abduction moves away from midline, and adduction moves toward midline;
none of these describe the elbow movement during nose scratching.
2. A researcher is observing two eukaryotic cells of the same type under a
microscope, but one appears significantly larger than the other. Based on
appearance alone, which cell would likely demonstrate a more active rate of
cellular respiration?
A. The larger cell because it has more mitochondria
B. The smaller cell because it has a higher surface area to volume ratio
C. The larger cell because it has more cytoplasm for metabolic reactions
D. Both cells would have the same respiratory rate regardless of size
Correct Answer: B. The smaller cell because it has a higher surface area to volume
ratio
,2|Page
Rationale: Smaller cells have a larger surface area relative to their volume,
allowing more efficient diffusion of gases and nutrients for metabolic processes
including respiration. Larger cells have decreased surface area to volume ratio,
slowing diffusion and reducing metabolic efficiency despite having more total
cellular components.
3. A patient has been diagnosed with osteoporosis. Which type of bone cell
would be deficient or less active in this condition?
A. Osteoclasts
B. Osteoblasts
C. Osteocytes
D. Chondrocytes
Correct Answer: B. Osteoblasts
Rationale: Osteoporosis results from bone resorption exceeding bone formation,
with decreased osteoblast activity leading to insufficient bone repair. Osteoclasts
may be normal or increased, osteocytes are mature bone cells, and chondrocytes
are cartilage cells not primarily involved in bone remodeling.
4. A healthcare provider is assessing a patient with a suspected rotator cuff
injury. If the axillary nerve has been damaged, which muscle would most
likely be affected?
A. Teres minor
B. Deltoid
C. Supraspinatus
D. Infraspinatus
Correct Answer: B. Deltoid
Rationale: The deltoid muscle is innervated by the axillary nerve; damage to this
nerve would affect deltoid function. Teres minor is also innervated by the axillary
nerve but the deltoid is the primary muscle affected, while supraspinatus and
infraspinatus are innervated by the suprascapular nerve.
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5. A patient with hypergastrinemia is at risk for developing gastric ulcers.
Which mechanism explains this increased risk?
A. Gastrin directly erodes the stomach lining
B. Gastrin stimulates excessive hydrochloric acid secretion
C. Gastrin decreases protective mucus production
D. Gastrin causes increased gastric motility
Correct Answer: B. Gastrin stimulates excessive hydrochloric acid secretion
Rationale: Hypergastrinemia causes excessive gastrin secretion, which stimulates
parietal cells to produce excess hydrochloric acid, damaging the protective
mucosal layer and leading to ulcer formation. Gastrin does not directly erode
tissue, and while it affects motility, the acid production is the primary mechanism
for ulcer development.
6. A nurse is teaching a patient about cellular respiration. Which organelle is
responsible for this metabolic process?
A. Ribosomes
B. Golgi apparatus
C. Mitochondria
D. Lysosomes
Correct Answer: C. Mitochondria
Rationale: Mitochondria are the organelles responsible for cellular respiration
and ATP production through aerobic metabolism. Ribosomes are involved in
protein synthesis, the Golgi apparatus in protein modification and packaging, and
lysosomes in intracellular digestion.
7. A patient is diagnosed with TaySachs disease. Which organelle within the
cell is primarily affected by this genetic disorder?
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A. Ribosomes
B. Mitochondria
C. Lysosomes
D. Peroxisomes
Correct Answer: C. Lysosomes
Rationale: TaySachs disease results from a deficiency of the enzyme
hexosaminidase A within lysosomes, leading to accumulation of GM2 gangliosides.
Ribosomes are involved in protein synthesis, mitochondria in energy production,
and peroxisomes in fatty acid oxidation; none are the primary organelle affected in
TaySachs disease.
8. During swallowing, the epiglottis moves inferiorly. What is the primary
purpose of this movement?
A. To open the airway for breathing
B. To close off the trachea and prevent aspiration
C. To propel food into the esophagus
D. To stimulate the gag reflex
Correct Answer: B. To close off the trachea and prevent aspiration
Rationale: The epiglottis moves inferiorly during swallowing to cover the trachea
(glottis), preventing food and liquid from entering the airway and lungs. It does not
open the airway, directly propel food, or stimulate the gag reflex; its primary
function is protective during the swallowing process.
9. A patient is having difficulty with wrist extension. Which muscle is most
likely affected if the posterior interosseous nerve is damaged?
A. Flexor carpi radialis
B. Extensor carpi ulnaris
C. Flexor carpi ulnaris
D. Palmaris longus
BIOD 151 – Essential Human Anatomy & Physiology I Final
Exam | Latest 2026 Edition | Comprehensive Exam Prep with
Practice Questions, Verified Answers & Detailed Rationales |
Instant PDF Download Available
1. A patient is standing in anatomical position and moves their hand to scratch
their nose. Which anatomical action term best describes the motion occurring
at their elbow joint?
A. Extension
B. Flexion
C. Abduction
D. Adduction
Correct Answer: B. Flexion
Rationale: Flexion is the movement that decreases the angle at a joint, such as
bending the elbow to bring the hand toward the face. Extension increases the
angle, abduction moves away from midline, and adduction moves toward midline;
none of these describe the elbow movement during nose scratching.
2. A researcher is observing two eukaryotic cells of the same type under a
microscope, but one appears significantly larger than the other. Based on
appearance alone, which cell would likely demonstrate a more active rate of
cellular respiration?
A. The larger cell because it has more mitochondria
B. The smaller cell because it has a higher surface area to volume ratio
C. The larger cell because it has more cytoplasm for metabolic reactions
D. Both cells would have the same respiratory rate regardless of size
Correct Answer: B. The smaller cell because it has a higher surface area to volume
ratio
,2|Page
Rationale: Smaller cells have a larger surface area relative to their volume,
allowing more efficient diffusion of gases and nutrients for metabolic processes
including respiration. Larger cells have decreased surface area to volume ratio,
slowing diffusion and reducing metabolic efficiency despite having more total
cellular components.
3. A patient has been diagnosed with osteoporosis. Which type of bone cell
would be deficient or less active in this condition?
A. Osteoclasts
B. Osteoblasts
C. Osteocytes
D. Chondrocytes
Correct Answer: B. Osteoblasts
Rationale: Osteoporosis results from bone resorption exceeding bone formation,
with decreased osteoblast activity leading to insufficient bone repair. Osteoclasts
may be normal or increased, osteocytes are mature bone cells, and chondrocytes
are cartilage cells not primarily involved in bone remodeling.
4. A healthcare provider is assessing a patient with a suspected rotator cuff
injury. If the axillary nerve has been damaged, which muscle would most
likely be affected?
A. Teres minor
B. Deltoid
C. Supraspinatus
D. Infraspinatus
Correct Answer: B. Deltoid
Rationale: The deltoid muscle is innervated by the axillary nerve; damage to this
nerve would affect deltoid function. Teres minor is also innervated by the axillary
nerve but the deltoid is the primary muscle affected, while supraspinatus and
infraspinatus are innervated by the suprascapular nerve.
,3|Page
5. A patient with hypergastrinemia is at risk for developing gastric ulcers.
Which mechanism explains this increased risk?
A. Gastrin directly erodes the stomach lining
B. Gastrin stimulates excessive hydrochloric acid secretion
C. Gastrin decreases protective mucus production
D. Gastrin causes increased gastric motility
Correct Answer: B. Gastrin stimulates excessive hydrochloric acid secretion
Rationale: Hypergastrinemia causes excessive gastrin secretion, which stimulates
parietal cells to produce excess hydrochloric acid, damaging the protective
mucosal layer and leading to ulcer formation. Gastrin does not directly erode
tissue, and while it affects motility, the acid production is the primary mechanism
for ulcer development.
6. A nurse is teaching a patient about cellular respiration. Which organelle is
responsible for this metabolic process?
A. Ribosomes
B. Golgi apparatus
C. Mitochondria
D. Lysosomes
Correct Answer: C. Mitochondria
Rationale: Mitochondria are the organelles responsible for cellular respiration
and ATP production through aerobic metabolism. Ribosomes are involved in
protein synthesis, the Golgi apparatus in protein modification and packaging, and
lysosomes in intracellular digestion.
7. A patient is diagnosed with TaySachs disease. Which organelle within the
cell is primarily affected by this genetic disorder?
, 4|Page
A. Ribosomes
B. Mitochondria
C. Lysosomes
D. Peroxisomes
Correct Answer: C. Lysosomes
Rationale: TaySachs disease results from a deficiency of the enzyme
hexosaminidase A within lysosomes, leading to accumulation of GM2 gangliosides.
Ribosomes are involved in protein synthesis, mitochondria in energy production,
and peroxisomes in fatty acid oxidation; none are the primary organelle affected in
TaySachs disease.
8. During swallowing, the epiglottis moves inferiorly. What is the primary
purpose of this movement?
A. To open the airway for breathing
B. To close off the trachea and prevent aspiration
C. To propel food into the esophagus
D. To stimulate the gag reflex
Correct Answer: B. To close off the trachea and prevent aspiration
Rationale: The epiglottis moves inferiorly during swallowing to cover the trachea
(glottis), preventing food and liquid from entering the airway and lungs. It does not
open the airway, directly propel food, or stimulate the gag reflex; its primary
function is protective during the swallowing process.
9. A patient is having difficulty with wrist extension. Which muscle is most
likely affected if the posterior interosseous nerve is damaged?
A. Flexor carpi radialis
B. Extensor carpi ulnaris
C. Flexor carpi ulnaris
D. Palmaris longus
