,ATI TEAS Science Exam Questions And Answers 2026/2027
SECTION 1: HUMAN ANATOMY & PHYSIOLOGY (18 Questions)
**1.** Which of the following is the primary function of the digestive system?
A) To transport oxygen throughout the body
B) To break down food and absorb nutrients
C) To regulate body temperature
D) To fight infections
**Correct Answer:** B) To break down food and absorb nutrients
**Rationale:** The digestive system is responsible for breaking down food
into absorbable nutrients and eliminating waste. The cardiovascular system
transports oxygen; the integumentary system regulates temperature; the
immune system fights infections.
---
**2.** Which of the following is NOT a function of the skeletal system?
A) Protecting internal organs
B) Producing red blood cells
C) Storing nutrients and minerals
D) Producing insulin
**Correct Answer:** D) Producing insulin
,**Rationale:** The skeletal system protects organs, produces blood cells in
bone marrow, and stores minerals. Insulin is produced by the pancreas
(endocrine system), not the skeletal system.
---
**3.** Which part of the brain is responsible for regulating heart rate and
breathing?
A) Cerebellum
B) Medulla oblongata
C) Thalamus
D) Hippocampus
**Correct Answer:** B) Medulla oblongata
**Rationale:** The medulla oblongata is part of the brainstem and controls
vital autonomic functions including heart rate, breathing, and blood pressure.
The cerebellum coordinates movement; the thalamus relays sensory
information; the hippocampus is involved in memory.
---
**4.** Which part of the human brain controls voluntary muscle movements?
A) Medulla oblongata
B) Cerebellum
C) Cerebrum
D) Hypothalamus
, **Correct Answer:** C) Cerebrum
**Rationale:** The cerebrum (specifically the motor cortex) controls
voluntary muscle movements. The medulla controls involuntary functions;
the cerebellum coordinates balance and fine motor skills; the hypothalamus
regulates homeostasis.
---
**5.** Which organ is primarily responsible for regulating metabolism in the
human body?
A) Heart
B) Brain
C) Liver
D) Thyroid
**Correct Answer:** D) Thyroid
**Rationale:** The thyroid gland produces hormones (T3 and T4) that
regulate the body's metabolic rate. The heart pumps blood; the brain
controls nervous system functions; the liver processes nutrients but does not
primarily regulate metabolism.
---
**6.** Which of the following describes the function of red blood cells?
SECTION 1: HUMAN ANATOMY & PHYSIOLOGY (18 Questions)
**1.** Which of the following is the primary function of the digestive system?
A) To transport oxygen throughout the body
B) To break down food and absorb nutrients
C) To regulate body temperature
D) To fight infections
**Correct Answer:** B) To break down food and absorb nutrients
**Rationale:** The digestive system is responsible for breaking down food
into absorbable nutrients and eliminating waste. The cardiovascular system
transports oxygen; the integumentary system regulates temperature; the
immune system fights infections.
---
**2.** Which of the following is NOT a function of the skeletal system?
A) Protecting internal organs
B) Producing red blood cells
C) Storing nutrients and minerals
D) Producing insulin
**Correct Answer:** D) Producing insulin
,**Rationale:** The skeletal system protects organs, produces blood cells in
bone marrow, and stores minerals. Insulin is produced by the pancreas
(endocrine system), not the skeletal system.
---
**3.** Which part of the brain is responsible for regulating heart rate and
breathing?
A) Cerebellum
B) Medulla oblongata
C) Thalamus
D) Hippocampus
**Correct Answer:** B) Medulla oblongata
**Rationale:** The medulla oblongata is part of the brainstem and controls
vital autonomic functions including heart rate, breathing, and blood pressure.
The cerebellum coordinates movement; the thalamus relays sensory
information; the hippocampus is involved in memory.
---
**4.** Which part of the human brain controls voluntary muscle movements?
A) Medulla oblongata
B) Cerebellum
C) Cerebrum
D) Hypothalamus
, **Correct Answer:** C) Cerebrum
**Rationale:** The cerebrum (specifically the motor cortex) controls
voluntary muscle movements. The medulla controls involuntary functions;
the cerebellum coordinates balance and fine motor skills; the hypothalamus
regulates homeostasis.
---
**5.** Which organ is primarily responsible for regulating metabolism in the
human body?
A) Heart
B) Brain
C) Liver
D) Thyroid
**Correct Answer:** D) Thyroid
**Rationale:** The thyroid gland produces hormones (T3 and T4) that
regulate the body's metabolic rate. The heart pumps blood; the brain
controls nervous system functions; the liver processes nutrients but does not
primarily regulate metabolism.
---
**6.** Which of the following describes the function of red blood cells?
