HESI A2 PRACTICE TEST QUESTIONS & VERIFIED ANSWERS WITH
RATIONALES| LATEST 2026 UPDATE
GRADED A+
1. Which of the following is NOT a function of the digestive tract?
a) to use enzymes to break down food
b) to perform gas exchange
c) to remove waste from the body
d) to use peristalsis to move food along:
b) to perform gas exchange
Gas exchange is a function of the respiratory system
***RATIONALE: The primary functions of the digestive tract include:
Using enzymes to break down food (Option A)
• Digestive enzymes chemically break food into nutrients that can be absorbed.
…
2. The body, at all times, attempts to maintain homeostasis. The best definition
of homeostasis is:
a) a process that maintains the stability of the human body's internal environ-
ment in response to changes in internal and external conditions
b) a function via which the body breaks down glucose to use as energy
c) a process that maintains the immune system's defenses
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,d) a process in which the body resists change to genetic structure:
a) a process that maintains the stability of the human body's internal environment in response to changes in
internal and external conditions
***RATIONALE: Homeostasis is the body's ability to maintain a stable internal environment (such as
temperature, blood pressure, pH, fluid balance, and glucose levels) despite changes inside or outside
the body. It works through feedback mechanisms, especially negative feedback, to keep body systems
balanced and functioning properly.
…
3. The endocrine system of the body is responsible for:
a) defense through the use of antibodies
b) communication through the use of hormones
c) metabolism through the use of enzymes
d) blood flow through the use of the heart muscle:
b) communication through the use of hormones
***RATIONALE The endocrine system is primarily responsible for communication and
regulation through hormones. Hormones are chemical messengers released by endocrine
glands (such as the thyroid, pituitary, and adrenal glands) into the bloodstream. They help
regulate many body functions, including growth, metabolism, reproduction, stress response,
and maintaining homeostasis.
…
4. Anatomical position shows the body in a(n) position.
a) lateral
b) superior
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, c) anterior
d) posterior:
c) anterior
***RATIONALE Anatomical position is the standard reference position for
describing the body and its parts. In this position, the body stands upright
facing forward, arms at the sides, palms facing forward, and feet slightly apart.
This places the body in an anterior (front-facing) position.
5. Vitamin K is created in the:
a) liver
b) lungs
c) intestinal tract
d) pancreas:
c) intestinal tract
***RATIONALE Vitamin K is synthesized by normal bacteria in the intestinal
tract, particularly in the large intestine. These beneficial gut microorganisms
produce vitamin K (especially vitamin K2), which helps the body maintain
normal blood clotting and supports bone health.
…
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16
RATIONALES| LATEST 2026 UPDATE
GRADED A+
1. Which of the following is NOT a function of the digestive tract?
a) to use enzymes to break down food
b) to perform gas exchange
c) to remove waste from the body
d) to use peristalsis to move food along:
b) to perform gas exchange
Gas exchange is a function of the respiratory system
***RATIONALE: The primary functions of the digestive tract include:
Using enzymes to break down food (Option A)
• Digestive enzymes chemically break food into nutrients that can be absorbed.
…
2. The body, at all times, attempts to maintain homeostasis. The best definition
of homeostasis is:
a) a process that maintains the stability of the human body's internal environ-
ment in response to changes in internal and external conditions
b) a function via which the body breaks down glucose to use as energy
c) a process that maintains the immune system's defenses
1/
16
,d) a process in which the body resists change to genetic structure:
a) a process that maintains the stability of the human body's internal environment in response to changes in
internal and external conditions
***RATIONALE: Homeostasis is the body's ability to maintain a stable internal environment (such as
temperature, blood pressure, pH, fluid balance, and glucose levels) despite changes inside or outside
the body. It works through feedback mechanisms, especially negative feedback, to keep body systems
balanced and functioning properly.
…
3. The endocrine system of the body is responsible for:
a) defense through the use of antibodies
b) communication through the use of hormones
c) metabolism through the use of enzymes
d) blood flow through the use of the heart muscle:
b) communication through the use of hormones
***RATIONALE The endocrine system is primarily responsible for communication and
regulation through hormones. Hormones are chemical messengers released by endocrine
glands (such as the thyroid, pituitary, and adrenal glands) into the bloodstream. They help
regulate many body functions, including growth, metabolism, reproduction, stress response,
and maintaining homeostasis.
…
4. Anatomical position shows the body in a(n) position.
a) lateral
b) superior
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16
, c) anterior
d) posterior:
c) anterior
***RATIONALE Anatomical position is the standard reference position for
describing the body and its parts. In this position, the body stands upright
facing forward, arms at the sides, palms facing forward, and feet slightly apart.
This places the body in an anterior (front-facing) position.
5. Vitamin K is created in the:
a) liver
b) lungs
c) intestinal tract
d) pancreas:
c) intestinal tract
***RATIONALE Vitamin K is synthesized by normal bacteria in the intestinal
tract, particularly in the large intestine. These beneficial gut microorganisms
produce vitamin K (especially vitamin K2), which helps the body maintain
normal blood clotting and supports bone health.
…
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16
