(HESI A2) Exam Readiness Guide Q & S - Anatomy & Physiology.

HESI A2



Anatomy & Physiology




EXAM READINESS GUIDE
Q&S




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, 1. Which layer of the heart wall is responsible for its
contractile function?

A) Endocardium
B) Myocardium
C) Epicardium
D) Pericardium

Correct Answer: B) Myocardium
Rationale: The myocardium is the muscular layer of the
heart wall responsible for its contractile activity, enabling the
heart to pump blood.

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2. Which component of the nervous system is primarily
responsible for the "fight or flight" response?

A) Somatic nervous system
B) Sympathetic nervous system
C) Parasympathetic nervous system
D) Enteric nervous system

Correct Answer: B) Sympathetic nervous system
Rationale: The sympathetic nervous system, part of the
autonomic nervous system, activates bodily responses
required for the "fight or flight" reaction.

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3. What is the main site of gas exchange in the respiratory
©2024/2025

, system?

A) Trachea
B) Bronchi
C) Alveoli
D) Bronchioles

Correct Answer: C) Alveoli
Rationale: Alveoli are the terminal ends of the respiratory
tree where gas exchange between the air and blood takes
place.

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4. How do osteocytes communicate with each other within
compact bone?

A) Haversian canals
B) Canaliculi
C) Lamellae
D) Lacunae

Correct Answer: B) Canaliculi
Rationale: Canaliculi are microscopic channels within
bones that allow osteocytes to exchange nutrients and
waste products with each other.

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5. What hormone is primarily involved in regulating
calcium levels in the blood?

A) Insulin
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