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ATI TEAS 2025 Anatomy & Physiology
Question 1
Which of the following structures is responsible for gas exchange in the lungs?
A. Trachea
B. Bronchi
C. Alveoli
D. Pleura
Correct Answer: C. Alveoli
Rationale:
The alveoli are small sac-like structures located at the ends of bronchioles within the lungs.
These structures are surrounded by capillaries and serve as the primary site for gas exchange.
Oxygen passes from the alveoli into the blood, and carbon dioxide moves from the blood into the
alveoli to be exhaled. While the trachea and bronchi serve as airways conducting air into the
lungs, they do not participate in gas exchange. The pleura is a protective membrane that
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surrounds the lungs but has no role in respiration. Understanding the function of alveoli is
essential for mastering respiratory physiology on the TEAS.
Question 2
Which part of the brain controls balance and coordination?
A. Cerebrum
B. Brainstem
C. Hypothalamus
D. Cerebellum
Correct Answer: D. Cerebellum
Rationale:
The cerebellum is located at the base of the brain and is responsible for regulating voluntary
motor movements, balance, coordination, and posture. Unlike the cerebrum, which manages
higher cognitive functions, or the brainstem, which controls involuntary actions like breathing,
the cerebellum ensures smooth and coordinated body movements. The hypothalamus is involved
in hormonal control and body homeostasis. This question is common in TEAS exams and is
fundamental to understanding the central nervous system.
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Question 2
Which part of the brain controls balance and coordination?
A. Cerebrum
B. Brainstem
C. Hypothalamus
D. Cerebellum
Correct Answer: D. Cerebellum
Rationale:
The cerebellum is located at the base of the brain and is responsible for regulating voluntary
motor movements, balance, coordination, and posture. Unlike the cerebrum, which manages
higher cognitive functions, or the brainstem, which controls involuntary actions like breathing,
the cerebellum ensures smooth and coordinated body movements. The hypothalamus is involved
in hormonal control and body homeostasis. This question is common in TEAS exams and is
fundamental to understanding the central nervous system.
Question 3
Which type of muscle tissue is found in the walls of hollow organs and helps move substances
through them?
A. Skeletal muscle
B. Cardiac muscle
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C. Smooth muscle
D. Voluntary muscle
Correct Answer: C. Smooth muscle
Rationale:
Smooth muscle is an involuntary muscle tissue found in the walls of hollow organs such as the
intestines, blood vessels, bladder, and uterus. Unlike skeletal muscle, it is not under conscious
control. Its contractions are slow and rhythmic, helping propel contents like food, blood, or urine
through various systems of the body. It does not have the striations seen in skeletal and cardiac
muscle. TEAS commonly tests understanding of different muscle types and their roles in various
systems.
Question 4
Which of the following best describes the primary function of the large intestine?
A. Absorption of nutrients
B. Digestion of proteins
C. Absorption of water and formation of feces
D. Secretion of digestive enzymes
Correct Answer: C. Absorption of water and formation of feces
Rationale:
The large intestine (colon) is primarily responsible for absorbing water and electrolytes from
ATI TEAS 2025 Anatomy & Physiology
Question 1
Which of the following structures is responsible for gas exchange in the lungs?
A. Trachea
B. Bronchi
C. Alveoli
D. Pleura
Correct Answer: C. Alveoli
Rationale:
The alveoli are small sac-like structures located at the ends of bronchioles within the lungs.
These structures are surrounded by capillaries and serve as the primary site for gas exchange.
Oxygen passes from the alveoli into the blood, and carbon dioxide moves from the blood into the
alveoli to be exhaled. While the trachea and bronchi serve as airways conducting air into the
lungs, they do not participate in gas exchange. The pleura is a protective membrane that
, 2
surrounds the lungs but has no role in respiration. Understanding the function of alveoli is
essential for mastering respiratory physiology on the TEAS.
Question 2
Which part of the brain controls balance and coordination?
A. Cerebrum
B. Brainstem
C. Hypothalamus
D. Cerebellum
Correct Answer: D. Cerebellum
Rationale:
The cerebellum is located at the base of the brain and is responsible for regulating voluntary
motor movements, balance, coordination, and posture. Unlike the cerebrum, which manages
higher cognitive functions, or the brainstem, which controls involuntary actions like breathing,
the cerebellum ensures smooth and coordinated body movements. The hypothalamus is involved
in hormonal control and body homeostasis. This question is common in TEAS exams and is
fundamental to understanding the central nervous system.
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Question 2
Which part of the brain controls balance and coordination?
A. Cerebrum
B. Brainstem
C. Hypothalamus
D. Cerebellum
Correct Answer: D. Cerebellum
Rationale:
The cerebellum is located at the base of the brain and is responsible for regulating voluntary
motor movements, balance, coordination, and posture. Unlike the cerebrum, which manages
higher cognitive functions, or the brainstem, which controls involuntary actions like breathing,
the cerebellum ensures smooth and coordinated body movements. The hypothalamus is involved
in hormonal control and body homeostasis. This question is common in TEAS exams and is
fundamental to understanding the central nervous system.
Question 3
Which type of muscle tissue is found in the walls of hollow organs and helps move substances
through them?
A. Skeletal muscle
B. Cardiac muscle
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C. Smooth muscle
D. Voluntary muscle
Correct Answer: C. Smooth muscle
Rationale:
Smooth muscle is an involuntary muscle tissue found in the walls of hollow organs such as the
intestines, blood vessels, bladder, and uterus. Unlike skeletal muscle, it is not under conscious
control. Its contractions are slow and rhythmic, helping propel contents like food, blood, or urine
through various systems of the body. It does not have the striations seen in skeletal and cardiac
muscle. TEAS commonly tests understanding of different muscle types and their roles in various
systems.
Question 4
Which of the following best describes the primary function of the large intestine?
A. Absorption of nutrients
B. Digestion of proteins
C. Absorption of water and formation of feces
D. Secretion of digestive enzymes
Correct Answer: C. Absorption of water and formation of feces
Rationale:
The large intestine (colon) is primarily responsible for absorbing water and electrolytes from
