ATI TEAS 7 Science Practice Questions
(2025) – In-Depth Review of Anatomy,
Physiology & Scientific Reasoning
Multiple-Choice and Multiple-Answer Questions (Questions
1–50)
Question 1
Which organ is primarily responsible for gas exchange in the respiratory system?
A. Trachea
B. Bronchi
C. Alveoli
D. Diaphragm
Answer: C
Rationale: Alveoli are the site of gas exchange, where oxygen diffuses into the blood and carbon
dioxide is removed. The trachea and bronchi are airways, and the diaphragm aids ventilation.
Question 2
What are two functions of the cardiovascular system? (Choose two.)
A. Regulates body temperature
B. Transports oxygen and nutrients
C. Produces bile
D. Circulates blood
Answer: B, D
Rationale: The cardiovascular system transports oxygen and nutrients (B) and circulates blood
(D) via the heart and blood vessels. Temperature regulation is primarily integumentary, and bile
production is hepatic.
Question 3
Which bone is classified as irregular?
A. Femur
B. Rib
C. Sacrum
D. Humerus
Answer: C
Rationale: The sacrum is an irregular bone due to its unique triangular shape, formed by fused
vertebrae. Femur and humerus are long bones, and ribs are flat bones.
, Question 4
What is the role of the hypothalamus in the endocrine system?
A. Produces insulin
B. Regulates pituitary gland activity
C. Synthesizes thyroid hormones
D. Controls bone growth
Answer: B
Rationale: The hypothalamus regulates the pituitary gland by releasing hormones that control
other endocrine glands. Insulin is produced by the pancreas, thyroid hormones by the thyroid,
and bone growth is influenced by growth hormone.
Question 5
Which muscle type is under voluntary control?
A. Smooth
B. Cardiac
C. Skeletal
D. Visceral
Answer: C
Rationale: Skeletal muscle is voluntary, controlled by the somatic nervous system. Smooth and
cardiac muscles are involuntary.
Question 6
In an experiment, the amount of sunlight a plant receives is changed to measure growth. What is
the independent variable?
A. Plant growth
B. Amount of sunlight
C. Soil type
D. Water amount
Answer: B
Rationale: The independent variable is the factor manipulated (amount of sunlight). Plant
growth is the dependent variable, and soil type and water are controlled variables.
Question 7
What are two components of the central nervous system? (Choose two.)
A. Brain
B. Spinal cord
C. Peripheral nerves
D. Ganglia
Answer: A, B
Rationale: The central nervous system consists of the brain (A) and spinal cord (B). Peripheral
nerves and ganglia are part of the peripheral nervous system.
(2025) – In-Depth Review of Anatomy,
Physiology & Scientific Reasoning
Multiple-Choice and Multiple-Answer Questions (Questions
1–50)
Question 1
Which organ is primarily responsible for gas exchange in the respiratory system?
A. Trachea
B. Bronchi
C. Alveoli
D. Diaphragm
Answer: C
Rationale: Alveoli are the site of gas exchange, where oxygen diffuses into the blood and carbon
dioxide is removed. The trachea and bronchi are airways, and the diaphragm aids ventilation.
Question 2
What are two functions of the cardiovascular system? (Choose two.)
A. Regulates body temperature
B. Transports oxygen and nutrients
C. Produces bile
D. Circulates blood
Answer: B, D
Rationale: The cardiovascular system transports oxygen and nutrients (B) and circulates blood
(D) via the heart and blood vessels. Temperature regulation is primarily integumentary, and bile
production is hepatic.
Question 3
Which bone is classified as irregular?
A. Femur
B. Rib
C. Sacrum
D. Humerus
Answer: C
Rationale: The sacrum is an irregular bone due to its unique triangular shape, formed by fused
vertebrae. Femur and humerus are long bones, and ribs are flat bones.
, Question 4
What is the role of the hypothalamus in the endocrine system?
A. Produces insulin
B. Regulates pituitary gland activity
C. Synthesizes thyroid hormones
D. Controls bone growth
Answer: B
Rationale: The hypothalamus regulates the pituitary gland by releasing hormones that control
other endocrine glands. Insulin is produced by the pancreas, thyroid hormones by the thyroid,
and bone growth is influenced by growth hormone.
Question 5
Which muscle type is under voluntary control?
A. Smooth
B. Cardiac
C. Skeletal
D. Visceral
Answer: C
Rationale: Skeletal muscle is voluntary, controlled by the somatic nervous system. Smooth and
cardiac muscles are involuntary.
Question 6
In an experiment, the amount of sunlight a plant receives is changed to measure growth. What is
the independent variable?
A. Plant growth
B. Amount of sunlight
C. Soil type
D. Water amount
Answer: B
Rationale: The independent variable is the factor manipulated (amount of sunlight). Plant
growth is the dependent variable, and soil type and water are controlled variables.
Question 7
What are two components of the central nervous system? (Choose two.)
A. Brain
B. Spinal cord
C. Peripheral nerves
D. Ganglia
Answer: A, B
Rationale: The central nervous system consists of the brain (A) and spinal cord (B). Peripheral
nerves and ganglia are part of the peripheral nervous system.
