HESI A2 Anatomy & Physiology Exam 2026 |
Practice Questions, Verified Answers & In-
Depth Rationales | Versions 1 & 2 | Just
Released This Year PDF | Updated This Year
HESI A2 ANATOMY & PHYSIOLOGY EXAM 2026 | PRACTICE QUESTIONS WITH
VERIFIED ANSWERS & IN-DEPTH RATIONALES
DOCUMENT OVERVIEW
• This comprehensive study material contains verified practice questions designed
to prepare you for the HESI A2 Anatomy & Physiology examination with detailed,
evidence-based rationales for each answer option.
• Study these questions systematically by reviewing each question, attempting to
answer before checking the correct answer, and thoroughly reading the rationale to
strengthen your conceptual understanding and exam readiness.
QUESTIONS
1. The cell membrane is primarily composed of which two components?
A) Proteins and carbohydrates
B) Lipids and carbohydrates
C) Phospholipids and proteins
D) Cholesterol and phospholipids
E) Nucleic acids and proteins
CORRECT ANSWER: C) Phospholipids and proteins
Rationale: The cell membrane follows the fluid mosaic model, where a
phospholipid bilayer forms the basic structure, with proteins embedded
throughout or attached to the surface. Phospholipids provide the structural
framework with their hydrophobic tails facing inward and hydrophilic heads facing
,outward, while proteins perform various functions including transport, cell
recognition, and catalysis. Carbohydrates are found as glycoproteins and glycolipids
but are not primary structural components. Cholesterol is present but in smaller
amounts, primarily in animal cells to regulate membrane fluidity.
2. Which organelle is responsible for producing ATP through cellular
respiration?
A) Ribosome
B) Lysosome
C) Mitochondrion
D) Golgi apparatus
E) Endoplasmic reticulum
CORRECT ANSWER: C) Mitochondrion
Rationale: The mitochondrion is known as the powerhouse of the cell because it
performs aerobic respiration, converting glucose and other nutrients into
adenosine triphosphate (ATP), which provides energy for cellular processes.
Ribosomes synthesize proteins, lysosomes contain digestive enzymes, the Golgi
apparatus packages proteins, and the endoplasmic reticulum synthesizes and
transports proteins and lipids. Only mitochondria have the cristae and necessary
enzyme complexes for ATP production through oxidative phosphorylation.
3. The nucleolus within the nucleus is primarily responsible for which
function?
A) DNA replication
B) rRNA synthesis and ribosome assembly
C) mRNA transcription regulation
D) Protein synthesis
,E) Chromosome condensation
CORRECT ANSWER: B) rRNA synthesis and ribosome assembly
Rationale: The nucleolus is a dense region within the nucleus where ribosomal
RNA (rRNA) is synthesized and where ribosomal proteins combine with rRNA to
assemble ribosomal subunits. These subunits are then exported to the cytoplasm
for ribosome assembly. DNA replication occurs throughout the nucleus, mRNA
transcription is regulated by the entire nucleus, protein synthesis occurs in
ribosomes in the cytoplasm, and chromosome condensation is a nuclear process
but not the primary function of the nucleolus.
4. Which of the following is NOT a function of epithelial tissue?
A) Protection
B) Absorption
C) Contraction
D) Secretion
E) Sensation
CORRECT ANSWER: C) Contraction
Rationale: Epithelial tissue provides protection (skin barrier), absorption (intestinal
lining), secretion (glands), and sensation (sensory receptors). However, contraction
is the primary function of muscle tissue, not epithelial tissue. Muscle tissue contains
specialized proteins like actin and myosin that allow for contraction and movement.
Epithelial cells do not have the contractile apparatus necessary for this function.
5. Stratified squamous epithelium is found primarily in which location?
A) Small intestine lining
B) Respiratory tract
C) Skin (epidermis) and mouth
, D) Blood vessels
E) Stomach lining
CORRECT ANSWER: C) Skin (epidermis) and mouth
Rationale: Stratified squamous epithelium consists of multiple layers of flat cells
and is specifically adapted for protection in areas subject to mechanical stress and
abrasion. This tissue type is found in the epidermis of the skin, lining of the mouth,
esophagus, and vagina. The small intestine has simple columnar epithelium for
absorption, the respiratory tract has simple cuboidal epithelium, blood vessels are
lined with simple squamous epithelium for diffusion, and the stomach has simple
columnar epithelium for secretion and absorption.
6. Which tissue type is highly vascular and provides support to organs?
A) Areolar connective tissue
B) Elastic connective tissue
C) Dense regular connective tissue
D) Cartilage
E) Bone
CORRECT ANSWER: A) Areolar connective tissue
Rationale: Areolar (loose) connective tissue is highly vascular and contains a
combination of fibroblasts, collagen fibers, and elastic fibers in a gel-like matrix. It
provides cushioning and support around organs, blood vessels, and nerves,
allowing for easy diffusion of nutrients and gases. Elastic tissue has limited vascular
supply and provides elasticity, dense regular tissue has few blood vessels and
provides strong attachment points, cartilage is avascular and provides support
without blood supply, and bone is vascular but primarily provides structural
support.
7. The dermis layer of skin contains all of the following EXCEPT:
Practice Questions, Verified Answers & In-
Depth Rationales | Versions 1 & 2 | Just
Released This Year PDF | Updated This Year
HESI A2 ANATOMY & PHYSIOLOGY EXAM 2026 | PRACTICE QUESTIONS WITH
VERIFIED ANSWERS & IN-DEPTH RATIONALES
DOCUMENT OVERVIEW
• This comprehensive study material contains verified practice questions designed
to prepare you for the HESI A2 Anatomy & Physiology examination with detailed,
evidence-based rationales for each answer option.
• Study these questions systematically by reviewing each question, attempting to
answer before checking the correct answer, and thoroughly reading the rationale to
strengthen your conceptual understanding and exam readiness.
QUESTIONS
1. The cell membrane is primarily composed of which two components?
A) Proteins and carbohydrates
B) Lipids and carbohydrates
C) Phospholipids and proteins
D) Cholesterol and phospholipids
E) Nucleic acids and proteins
CORRECT ANSWER: C) Phospholipids and proteins
Rationale: The cell membrane follows the fluid mosaic model, where a
phospholipid bilayer forms the basic structure, with proteins embedded
throughout or attached to the surface. Phospholipids provide the structural
framework with their hydrophobic tails facing inward and hydrophilic heads facing
,outward, while proteins perform various functions including transport, cell
recognition, and catalysis. Carbohydrates are found as glycoproteins and glycolipids
but are not primary structural components. Cholesterol is present but in smaller
amounts, primarily in animal cells to regulate membrane fluidity.
2. Which organelle is responsible for producing ATP through cellular
respiration?
A) Ribosome
B) Lysosome
C) Mitochondrion
D) Golgi apparatus
E) Endoplasmic reticulum
CORRECT ANSWER: C) Mitochondrion
Rationale: The mitochondrion is known as the powerhouse of the cell because it
performs aerobic respiration, converting glucose and other nutrients into
adenosine triphosphate (ATP), which provides energy for cellular processes.
Ribosomes synthesize proteins, lysosomes contain digestive enzymes, the Golgi
apparatus packages proteins, and the endoplasmic reticulum synthesizes and
transports proteins and lipids. Only mitochondria have the cristae and necessary
enzyme complexes for ATP production through oxidative phosphorylation.
3. The nucleolus within the nucleus is primarily responsible for which
function?
A) DNA replication
B) rRNA synthesis and ribosome assembly
C) mRNA transcription regulation
D) Protein synthesis
,E) Chromosome condensation
CORRECT ANSWER: B) rRNA synthesis and ribosome assembly
Rationale: The nucleolus is a dense region within the nucleus where ribosomal
RNA (rRNA) is synthesized and where ribosomal proteins combine with rRNA to
assemble ribosomal subunits. These subunits are then exported to the cytoplasm
for ribosome assembly. DNA replication occurs throughout the nucleus, mRNA
transcription is regulated by the entire nucleus, protein synthesis occurs in
ribosomes in the cytoplasm, and chromosome condensation is a nuclear process
but not the primary function of the nucleolus.
4. Which of the following is NOT a function of epithelial tissue?
A) Protection
B) Absorption
C) Contraction
D) Secretion
E) Sensation
CORRECT ANSWER: C) Contraction
Rationale: Epithelial tissue provides protection (skin barrier), absorption (intestinal
lining), secretion (glands), and sensation (sensory receptors). However, contraction
is the primary function of muscle tissue, not epithelial tissue. Muscle tissue contains
specialized proteins like actin and myosin that allow for contraction and movement.
Epithelial cells do not have the contractile apparatus necessary for this function.
5. Stratified squamous epithelium is found primarily in which location?
A) Small intestine lining
B) Respiratory tract
C) Skin (epidermis) and mouth
, D) Blood vessels
E) Stomach lining
CORRECT ANSWER: C) Skin (epidermis) and mouth
Rationale: Stratified squamous epithelium consists of multiple layers of flat cells
and is specifically adapted for protection in areas subject to mechanical stress and
abrasion. This tissue type is found in the epidermis of the skin, lining of the mouth,
esophagus, and vagina. The small intestine has simple columnar epithelium for
absorption, the respiratory tract has simple cuboidal epithelium, blood vessels are
lined with simple squamous epithelium for diffusion, and the stomach has simple
columnar epithelium for secretion and absorption.
6. Which tissue type is highly vascular and provides support to organs?
A) Areolar connective tissue
B) Elastic connective tissue
C) Dense regular connective tissue
D) Cartilage
E) Bone
CORRECT ANSWER: A) Areolar connective tissue
Rationale: Areolar (loose) connective tissue is highly vascular and contains a
combination of fibroblasts, collagen fibers, and elastic fibers in a gel-like matrix. It
provides cushioning and support around organs, blood vessels, and nerves,
allowing for easy diffusion of nutrients and gases. Elastic tissue has limited vascular
supply and provides elasticity, dense regular tissue has few blood vessels and
provides strong attachment points, cartilage is avascular and provides support
without blood supply, and bone is vascular but primarily provides structural
support.
7. The dermis layer of skin contains all of the following EXCEPT:
