HESI A2 Exam Bank: Human Organ Systems | 200 Practice Questions & Rationales

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HESI A2 Exam Bank: Human Organ Systems |
200 Practice Questions & Rationales




Table of Contents
Subtopic 1: Nervous and Endocrine System Interactions ................................................. 2
Subtopic 2: Cardiovascular and Respiratory System Integration ..................................... 10
Subtopic 3: Digestive and Excretory System Coordination .............................................. 18
Subtopic 4: Muscular and Skeletal System Interactions ................................................. 26
Subtopic 5: Integumentary and Immune System Collaboration ...................................... 34
Subtopic 6: Lymphatic and Circulatory System Interactions ........................................... 43
Subtopic 7: Reproductive and Endocrine System Coordination ...................................... 51
Subtopic 8: Respiratory and Circulatory System Synergy ................................................ 60
Subtopic 9: Skin, Immune, and Nervous System Interactions ......................................... 68
Subtopic 10: Sensory Organs and Multisystem Integration ............................................. 76

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Subtopic 1: Nervous and Endocrine System Interactions
Question 1:

Which structure in the brain is primarily responsible for linking the nervous system to the
endocrine system via the pituitary gland?

A. Cerebellum

B. Hypothalamus

C. Medulla oblongata

D. Thalamus



Rationale:

The hypothalamus serves as the key connection between the nervous and endocrine
systems, regulating hormones via the pituitary gland.



Question 2:

What hormone is released by the adrenal medulla during the "fight or flight" response?

A. Cortisol

B. Epinephrine

C. Insulin

D. Estrogen



Rationale:

Epinephrine (adrenaline) is secreted by the adrenal medulla in response to stress signals
from the sympathetic nervous system.



Question 3:

Which part of the autonomic nervous system is activated during rest and digestion?

A. Sympathetic

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B. Parasympathetic

C. Central

D. Somatic



Rationale:

The parasympathetic nervous system conserves energy and is active during restful states,
promoting digestion and recovery.



Question 4:

Thyroid-stimulating hormone (TSH) is secreted by which gland?

A. Thyroid

B. Anterior pituitary

C. Hypothalamus

D. Adrenal cortex



Rationale:

The anterior pituitary secretes TSH to stimulate the thyroid gland, demonstrating endocrine
feedback regulation.



Question 5:

Which neurotransmitter is primarily involved in muscle contraction at neuromuscular
junctions?

A. Dopamine

B. Acetylcholine

C. Serotonin

D. Norepinephrine

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Rationale:

Acetylcholine is released at neuromuscular junctions to stimulate skeletal muscle
contraction.



Question 6:

A patient with a pituitary tumor may have disrupted hormonal signals. Which body system
is likely to show secondary effects?

A. Digestive

B. Muscular

C. Reproductive

D. Skeletal



Rationale:

The reproductive system can be affected due to altered release of LH and FSH from the
pituitary, disrupting hormone regulation.



Question 7:

Which part of the brain controls autonomic functions like heart rate and breathing?

A. Cerebellum

B. Medulla oblongata

C. Cerebrum

D. Hypothalamus



Rationale:

The medulla oblongata controls vital autonomic functions such as breathing, heart rate,
and blood pressure.