ATI TEAS 7 SCIENCE EXAM
Question 1
Which of the following is the primary function of a totipotent cell?
A. Carries electrical impulses
B. Develops into any kind of cell
C. Aids in the maturation of sex cells
D. Fights infectious diseases
Correct Answer: B
Explanation:
Totipotent cells have the ability to develop into any cell type, including
embryonic and extraembryonic tissues.
A is incorrect: neurons carry electrical impulses.
C is incorrect: sex cell maturation occurs in reproductive organs.
D is incorrect: immune cells fight infections.
Question 2
Which organ system is primarily responsible for maintaining the body’s pH
balance?
A. Digestive system
B. Respiratory system
, ATI TEAS 7 SCIENCE EXAM
C. Nervous system
D. Muscular system
Correct Answer: B
Explanation:
The respiratory system regulates pH by controlling carbon dioxide levels in the
blood.
A helps with digestion, not pH regulation.
C controls body responses but not pH directly.
D is responsible for movement.
Question 3
Which structure controls the movement of substances into and out of the cell?
A. Nucleus
B. Cell membrane
C. Mitochondria
D. Ribosome
Correct Answer: B
Explanation:
The cell membrane is selectively permeable and regulates what enters and exits
the cell.
A controls genetic material.
C produces energy.
, ATI TEAS 7 SCIENCE EXAM
D synthesizes proteins.
Question 4
Which part of the brain regulates breathing and heart rate?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus
Correct Answer: C
Explanation:
The medulla oblongata controls vital involuntary functions such as breathing and
heart rate.
A handles higher thinking.
B coordinates movement.
D regulates temperature and hormones.
Question 5
What is the main function of red blood cells?
A. Fight infection
B. Transport oxygen
C. Regulate clotting
D. Produce antibodies
, ATI TEAS 7 SCIENCE EXAM
Correct Answer: B
Explanation:
Red blood cells contain hemoglobin, which carries oxygen throughout the body.
A is performed by white blood cells.
C is the role of platelets.
D is done by B lymphocytes.
Question 6
Which hormone regulates blood glucose levels by lowering them?
A. Glucagon
B. Insulin
C. Cortisol
D. Epinephrine
Correct Answer: B
Explanation:
Insulin lowers blood glucose by allowing cells to take up glucose.
A raises blood glucose.
C is a stress hormone.
D prepares the body for fight-or-flight.
Question 7
Question 1
Which of the following is the primary function of a totipotent cell?
A. Carries electrical impulses
B. Develops into any kind of cell
C. Aids in the maturation of sex cells
D. Fights infectious diseases
Correct Answer: B
Explanation:
Totipotent cells have the ability to develop into any cell type, including
embryonic and extraembryonic tissues.
A is incorrect: neurons carry electrical impulses.
C is incorrect: sex cell maturation occurs in reproductive organs.
D is incorrect: immune cells fight infections.
Question 2
Which organ system is primarily responsible for maintaining the body’s pH
balance?
A. Digestive system
B. Respiratory system
, ATI TEAS 7 SCIENCE EXAM
C. Nervous system
D. Muscular system
Correct Answer: B
Explanation:
The respiratory system regulates pH by controlling carbon dioxide levels in the
blood.
A helps with digestion, not pH regulation.
C controls body responses but not pH directly.
D is responsible for movement.
Question 3
Which structure controls the movement of substances into and out of the cell?
A. Nucleus
B. Cell membrane
C. Mitochondria
D. Ribosome
Correct Answer: B
Explanation:
The cell membrane is selectively permeable and regulates what enters and exits
the cell.
A controls genetic material.
C produces energy.
, ATI TEAS 7 SCIENCE EXAM
D synthesizes proteins.
Question 4
Which part of the brain regulates breathing and heart rate?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus
Correct Answer: C
Explanation:
The medulla oblongata controls vital involuntary functions such as breathing and
heart rate.
A handles higher thinking.
B coordinates movement.
D regulates temperature and hormones.
Question 5
What is the main function of red blood cells?
A. Fight infection
B. Transport oxygen
C. Regulate clotting
D. Produce antibodies
, ATI TEAS 7 SCIENCE EXAM
Correct Answer: B
Explanation:
Red blood cells contain hemoglobin, which carries oxygen throughout the body.
A is performed by white blood cells.
C is the role of platelets.
D is done by B lymphocytes.
Question 6
Which hormone regulates blood glucose levels by lowering them?
A. Glucagon
B. Insulin
C. Cortisol
D. Epinephrine
Correct Answer: B
Explanation:
Insulin lowers blood glucose by allowing cells to take up glucose.
A raises blood glucose.
C is a stress hormone.
D prepares the body for fight-or-flight.
Question 7
