ATI TEAS Exam 2027 | Practice Questions & Correct
Answers | Latest Study Guide & Complete Exam Prep
1. What cell is similar to T cells?
Correct answer: Killer cells (cytotoxic T cells)
Rationale: Cytotoxic T cells (killer T cells) directly destroy infected or cancerous cells.
2. What hormone responds to stress?
Correct answer: Cortisol
Rationale: Cortisol is released by the adrenal cortex during the stress response to
increase glucose availability.
3. What hormone helps to regulate sodium?
Correct answer: Aldosterone (made by the adrenal gland)
Rationale: Aldosterone increases sodium reabsorption in the kidneys, which also affects
water balance and blood pressure.
4. What skin layer contains dead cells?
Correct answer: Stratum corneum
Rationale: The outermost layer of the epidermis, the stratum corneum, is composed of
dead keratinized cells that protect underlying tissues.
5. Why is the cell in a hypertonic solution?
Correct answer: Water moves out of the cell / lower water concentration outside
Rationale: In a hypertonic solution, water concentration outside the cell is lower, so
water moves out by osmosis, causing the cell to shrink.
6. What releases sodium bicarbonate?
Correct answer: Pancreas
Rationale: The pancreas secretes sodium bicarbonate to neutralize stomach acid in the
duodenum.
7. Base Pair Nucleotides with double strand of DNA
Correct answer: Purines: adenine (A), guanine (G); Pyrimidines: cytosine (C), thymine (T)
Rationale: In DNA, A pairs with T and G pairs with C via hydrogen bonds.
8. Pulmonary circuit
Correct answer: Deoxygenated blood away from the right ventricle, to the lungs, and
returns oxygenated blood to the left atrium and ventricle of the heart.
Answers | Latest Study Guide & Complete Exam Prep
1. What cell is similar to T cells?
Correct answer: Killer cells (cytotoxic T cells)
Rationale: Cytotoxic T cells (killer T cells) directly destroy infected or cancerous cells.
2. What hormone responds to stress?
Correct answer: Cortisol
Rationale: Cortisol is released by the adrenal cortex during the stress response to
increase glucose availability.
3. What hormone helps to regulate sodium?
Correct answer: Aldosterone (made by the adrenal gland)
Rationale: Aldosterone increases sodium reabsorption in the kidneys, which also affects
water balance and blood pressure.
4. What skin layer contains dead cells?
Correct answer: Stratum corneum
Rationale: The outermost layer of the epidermis, the stratum corneum, is composed of
dead keratinized cells that protect underlying tissues.
5. Why is the cell in a hypertonic solution?
Correct answer: Water moves out of the cell / lower water concentration outside
Rationale: In a hypertonic solution, water concentration outside the cell is lower, so
water moves out by osmosis, causing the cell to shrink.
6. What releases sodium bicarbonate?
Correct answer: Pancreas
Rationale: The pancreas secretes sodium bicarbonate to neutralize stomach acid in the
duodenum.
7. Base Pair Nucleotides with double strand of DNA
Correct answer: Purines: adenine (A), guanine (G); Pyrimidines: cytosine (C), thymine (T)
Rationale: In DNA, A pairs with T and G pairs with C via hydrogen bonds.
8. Pulmonary circuit
Correct answer: Deoxygenated blood away from the right ventricle, to the lungs, and
returns oxygenated blood to the left atrium and ventricle of the heart.
