HESI A2 Anatomy & Physiology Exam
Questions and Correct Answers
Question 1
Which of the following terms describes the process of forming new red blood cells?
Correct Answer
Erythropoiesis
Question 1: During cellular respiration, which organelle is primarily
responsible for generating ATP through the electron transport chain?
A. Ribosome
B. Mitochondrion
C. Golgi apparatus
D. Lysosome
CORRECT ANSWER: B. Mitochondrion
Rationale: The mitochondrion is the powerhouse of the cell, where the
electron transport chain and oxidative phosphorylation occur to produce the
majority of the cell's ATP.
Question 2: Which type of tissue lines the interior of the heart and blood
vessels to provide a smooth surface for blood flow?
A. Simple squamous epithelium
B. Stratified cuboidal epithelium
C. Transitional epithelium
D. Pseudostratified columnar epithelium
CORRECT ANSWER: A. Simple squamous epithelium
Rationale: Simple squamous epithelium, specifically called endothelium when
lining the cardiovascular system, allows for rapid diffusion and provides a
frictionless surface for blood flow.
Question 3: What is the primary function of the Golgi apparatus within a
eukaryotic cell?
A. Synthesis of lipids
B. Modification, sorting, and packaging of proteins for secretion
C. Degradation of cellular waste
D. Production of ribosomal RNA
CORRECT ANSWER: B. Modification, sorting, and packaging of proteins for
secretion
Rationale: The Golgi apparatus receives proteins from the rough
endoplasmic reticulum, modifies them, and packages them into vesicles for
Page 1 of 53
,transport to their final destinations.
Question 4: Which connective tissue proper is characterized by a dense,
irregular arrangement of collagen fibers and is found in the dermis of the
skin?
A. Areolar tissue
B. Adipose tissue
C. Dense regular connective tissue
D. Dense irregular connective tissue
CORRECT ANSWER: D. Dense irregular connective tissue
Rationale: Dense irregular connective tissue contains thick collagen fibers
arranged in multiple planes, providing strong structural support in areas
subjected to multidirectional stress, such as the dermis.
Question 5: Which phase of the cell cycle involves the replication of DNA
in preparation for cell division?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
CORRECT ANSWER: B. S phase
Rationale: The S (synthesis) phase of interphase is when the cell replicates its
entire genome, ensuring that each daughter cell will receive a complete set
of genetic information.
Question 6: What type of gland secretes its products directly into the
bloodstream rather than through a duct?
A. Exocrine gland
B. Endocrine gland
C. Holocrine gland
D. Merocrine gland
CORRECT ANSWER: B. Endocrine gland
Rationale: Endocrine glands are ductless glands that release hormones
directly into the interstitial fluid and then into the bloodstream to target
distant organs.
Question 7: Which cellular junction allows for the direct passage of ions
and small molecules between adjacent cells, facilitating electrical coupling
in cardiac muscle?
A. Tight junction
B. Desmosome
C. Gap junction
D. Hemidesmosome
Page 2 of 53
,CORRECT ANSWER: C. Gap junction
Rationale: Gap junctions form channels between adjacent cells that allow
ions and small molecules to pass, enabling synchronized contraction in
cardiac and smooth muscle.
Question 8: Which type of muscle tissue is striated, multinucleated, and
under voluntary control?
A. Smooth muscle
B. Cardiac muscle
C. Skeletal muscle
D. Visceral muscle
CORRECT ANSWER: C. Skeletal muscle
Rationale: Skeletal muscle is characterized by its striated appearance,
multiple peripherally located nuclei, and voluntary control via the somatic
nervous system.
Question 9: What is the primary role of lysosomes within the cell?
A. Protein synthesis
B. Intracellular digestion and waste removal
C. ATP production
D. Calcium storage
CORRECT ANSWER: B. Intracellular digestion and waste removal
Rationale: Lysosomes contain hydrolytic enzymes that break down
macromolecules, old organelles, and engulfed pathogens, acting as the cell's
digestive and recycling system.
Question 10: Which tissue type is responsible for forming the epidermis of
the skin and providing a protective barrier against the environment?
A. Connective tissue
B. Epithelial tissue
C. Muscle tissue
D. Nervous tissue
CORRECT ANSWER: B. Epithelial tissue
Rationale: Epithelial tissue covers body surfaces and lines cavities; the
epidermis is composed of stratified squamous epithelium that protects
underlying tissues from abrasion and pathogens.
Question 11: Which organelle is responsible for the synthesis of lipids and
the detoxification of drugs and poisons?
A. Rough endoplasmic reticulum
B. Smooth endoplasmic reticulum
C. Nucleus
D. Peroxisome
Page 3 of 53
, CORRECT ANSWER: B. Smooth endoplasmic reticulum
Rationale: The smooth endoplasmic reticulum lacks ribosomes and is
primarily involved in lipid synthesis, carbohydrate metabolism, and
detoxification of toxins, especially in liver cells.
Question 12: What is the function of microvilli on the apical surface of
certain epithelial cells?
A. To facilitate cell movement
B. To increase the surface area for absorption
C. To secrete mucus
D. To anchor cells to the basement membrane
CORRECT ANSWER: B. To increase the surface area for absorption
Rationale: Microvilli are finger-like projections that significantly increase the
surface area of the cell membrane, maximizing absorption efficiency in areas
like the small intestine.
Question 13: Which type of cartilage provides strong support and
withstands heavy pressure, found in intervertebral discs and the pubic
symphysis?
A. Hyaline cartilage
B. Elastic cartilage
C. Fibrocartilage
D. Articular cartilage
CORRECT ANSWER: C. Fibrocartilage
Rationale: Fibrocartilage contains thick bundles of collagen fibers, making it
highly resistant to compression and shear forces, ideal for shock absorption
in joints and the spine.
Question 14: During which phase of mitosis do the sister chromatids
separate and move toward opposite poles of the cell?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
CORRECT ANSWER: C. Anaphase
Rationale: In anaphase, the centromeres split, and the spindle fibers pull the
separated sister chromatids to opposite poles of the cell, ensuring equal
genetic distribution.
Question 15: Which cell junction prevents the leakage of extracellular fluid
across a layer of epithelial cells by tightly binding them together?
A. Tight junction
B. Gap junction
Page 4 of 53
Questions and Correct Answers
Question 1
Which of the following terms describes the process of forming new red blood cells?
Correct Answer
Erythropoiesis
Question 1: During cellular respiration, which organelle is primarily
responsible for generating ATP through the electron transport chain?
A. Ribosome
B. Mitochondrion
C. Golgi apparatus
D. Lysosome
CORRECT ANSWER: B. Mitochondrion
Rationale: The mitochondrion is the powerhouse of the cell, where the
electron transport chain and oxidative phosphorylation occur to produce the
majority of the cell's ATP.
Question 2: Which type of tissue lines the interior of the heart and blood
vessels to provide a smooth surface for blood flow?
A. Simple squamous epithelium
B. Stratified cuboidal epithelium
C. Transitional epithelium
D. Pseudostratified columnar epithelium
CORRECT ANSWER: A. Simple squamous epithelium
Rationale: Simple squamous epithelium, specifically called endothelium when
lining the cardiovascular system, allows for rapid diffusion and provides a
frictionless surface for blood flow.
Question 3: What is the primary function of the Golgi apparatus within a
eukaryotic cell?
A. Synthesis of lipids
B. Modification, sorting, and packaging of proteins for secretion
C. Degradation of cellular waste
D. Production of ribosomal RNA
CORRECT ANSWER: B. Modification, sorting, and packaging of proteins for
secretion
Rationale: The Golgi apparatus receives proteins from the rough
endoplasmic reticulum, modifies them, and packages them into vesicles for
Page 1 of 53
,transport to their final destinations.
Question 4: Which connective tissue proper is characterized by a dense,
irregular arrangement of collagen fibers and is found in the dermis of the
skin?
A. Areolar tissue
B. Adipose tissue
C. Dense regular connective tissue
D. Dense irregular connective tissue
CORRECT ANSWER: D. Dense irregular connective tissue
Rationale: Dense irregular connective tissue contains thick collagen fibers
arranged in multiple planes, providing strong structural support in areas
subjected to multidirectional stress, such as the dermis.
Question 5: Which phase of the cell cycle involves the replication of DNA
in preparation for cell division?
A. G1 phase
B. S phase
C. G2 phase
D. M phase
CORRECT ANSWER: B. S phase
Rationale: The S (synthesis) phase of interphase is when the cell replicates its
entire genome, ensuring that each daughter cell will receive a complete set
of genetic information.
Question 6: What type of gland secretes its products directly into the
bloodstream rather than through a duct?
A. Exocrine gland
B. Endocrine gland
C. Holocrine gland
D. Merocrine gland
CORRECT ANSWER: B. Endocrine gland
Rationale: Endocrine glands are ductless glands that release hormones
directly into the interstitial fluid and then into the bloodstream to target
distant organs.
Question 7: Which cellular junction allows for the direct passage of ions
and small molecules between adjacent cells, facilitating electrical coupling
in cardiac muscle?
A. Tight junction
B. Desmosome
C. Gap junction
D. Hemidesmosome
Page 2 of 53
,CORRECT ANSWER: C. Gap junction
Rationale: Gap junctions form channels between adjacent cells that allow
ions and small molecules to pass, enabling synchronized contraction in
cardiac and smooth muscle.
Question 8: Which type of muscle tissue is striated, multinucleated, and
under voluntary control?
A. Smooth muscle
B. Cardiac muscle
C. Skeletal muscle
D. Visceral muscle
CORRECT ANSWER: C. Skeletal muscle
Rationale: Skeletal muscle is characterized by its striated appearance,
multiple peripherally located nuclei, and voluntary control via the somatic
nervous system.
Question 9: What is the primary role of lysosomes within the cell?
A. Protein synthesis
B. Intracellular digestion and waste removal
C. ATP production
D. Calcium storage
CORRECT ANSWER: B. Intracellular digestion and waste removal
Rationale: Lysosomes contain hydrolytic enzymes that break down
macromolecules, old organelles, and engulfed pathogens, acting as the cell's
digestive and recycling system.
Question 10: Which tissue type is responsible for forming the epidermis of
the skin and providing a protective barrier against the environment?
A. Connective tissue
B. Epithelial tissue
C. Muscle tissue
D. Nervous tissue
CORRECT ANSWER: B. Epithelial tissue
Rationale: Epithelial tissue covers body surfaces and lines cavities; the
epidermis is composed of stratified squamous epithelium that protects
underlying tissues from abrasion and pathogens.
Question 11: Which organelle is responsible for the synthesis of lipids and
the detoxification of drugs and poisons?
A. Rough endoplasmic reticulum
B. Smooth endoplasmic reticulum
C. Nucleus
D. Peroxisome
Page 3 of 53
, CORRECT ANSWER: B. Smooth endoplasmic reticulum
Rationale: The smooth endoplasmic reticulum lacks ribosomes and is
primarily involved in lipid synthesis, carbohydrate metabolism, and
detoxification of toxins, especially in liver cells.
Question 12: What is the function of microvilli on the apical surface of
certain epithelial cells?
A. To facilitate cell movement
B. To increase the surface area for absorption
C. To secrete mucus
D. To anchor cells to the basement membrane
CORRECT ANSWER: B. To increase the surface area for absorption
Rationale: Microvilli are finger-like projections that significantly increase the
surface area of the cell membrane, maximizing absorption efficiency in areas
like the small intestine.
Question 13: Which type of cartilage provides strong support and
withstands heavy pressure, found in intervertebral discs and the pubic
symphysis?
A. Hyaline cartilage
B. Elastic cartilage
C. Fibrocartilage
D. Articular cartilage
CORRECT ANSWER: C. Fibrocartilage
Rationale: Fibrocartilage contains thick bundles of collagen fibers, making it
highly resistant to compression and shear forces, ideal for shock absorption
in joints and the spine.
Question 14: During which phase of mitosis do the sister chromatids
separate and move toward opposite poles of the cell?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
CORRECT ANSWER: C. Anaphase
Rationale: In anaphase, the centromeres split, and the spindle fibers pull the
separated sister chromatids to opposite poles of the cell, ensuring equal
genetic distribution.
Question 15: Which cell junction prevents the leakage of extracellular fluid
across a layer of epithelial cells by tightly binding them together?
A. Tight junction
B. Gap junction
Page 4 of 53
