ATI TEAS Practice Science Test

Correct Answer: D

Rationale: The correct answer is D because killer T cells have receptors that can recognize specific proteins displayed on the surface of infected cells. This recognition is crucial for the immune system to target and destroy infected cells effectively. The other choices are incorrect because B cells do not flag infected cells with amino acids (A), viral RNA remnants are not used for recognition by killer T cells (B), and macrophages do not directly help in identifying infected cells for killer T cell response (C). Overall, choice D stands out as the most accurate explanation based on the mechanism of T cell recognition in the immune response.

Correct Answer: A

Rationale: The correct answer is A: Cell. Cells are the most basic unit of structure in living things because they are the building blocks of all living organisms. Cells perform all the necessary functions for life, such as growth, reproduction, and energy production. Organelles are structures within cells, not the basic unit themselves. Oxygen is a vital component for life but not a structural unit. Pigments are molecules that give color and have specific functions in organisms but are not the basic unit of structure. Therefore, the correct choice is A: Cell.

Correct Answer: C

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: B

Rationale: The correct answer is B: Prone. Prone position allows access to the stomach as the patient lies on their stomach, facilitating examination or procedures on the abdominal area. In the prone position, the stomach is easily accessible for palpation or diagnostic tests. The other choices are incorrect because: A: Medial refers to the midline of the body and does not specifically provide access to the stomach. C: Superficial refers to the location near the surface and does not relate to positioning for stomach access. D: Supine refers to lying on the back, which is not ideal for direct access to the stomach.

Correct Answer: D

Rationale: The correct answer is D: Melanocyte-stimulating hormone. Melanocyte-stimulating hormone stimulates the melanocytes in the skin to produce melanin, the pigment responsible for skin color. This hormone darkens the skin by increasing melanin production. A: Follicle-stimulating hormone is involved in reproductive functions, not skin color changes. B: Growth-stimulating hormone primarily affects growth and development, not skin color. C: Thyroid-stimulating hormone regulates thyroid function, not skin color.