Quizlet HESI A2 Anatomy and Physiology

Correct Answer: B

Rationale: The correct answer is B: To produce hormones. Adrenal glands are responsible for producing important hormones such as cortisol, adrenaline, and aldosterone. These hormones play crucial roles in regulating metabolism, immune response, and stress levels. Choice A is incorrect because blood sugar regulation is primarily controlled by the pancreas. Choice C is incorrect as the production of red blood cells occurs in the bone marrow. Choice D is incorrect as the filtering of blood is mainly carried out by the kidneys.

Correct Answer: B

Rationale: The correct answer is B: Lens. The lens in the eye is responsible for focusing light on the retina by changing its shape to adjust the focal point. The cornea (A) helps to initially focus light but does not have the ability to adjust focus. The retina (C) is the light-sensitive layer that receives focused light, not the structure that focuses light. The pupil (D) regulates the amount of light entering the eye but does not focus light on the retina.

Correct Answer: B

Rationale: The correct answer is B: To produce hormones. Adrenal glands are responsible for producing important hormones such as cortisol, adrenaline, and aldosterone. These hormones play crucial roles in regulating metabolism, immune response, and stress levels. Choice A is incorrect because blood sugar regulation is primarily controlled by the pancreas. Choice C is incorrect as the production of red blood cells occurs in the bone marrow. Choice D is incorrect as the filtering of blood is mainly carried out by the kidneys.

Correct Answer: B

Rationale: The correct answer is B: To protect the body from external damage. The skin acts as a physical barrier, preventing harmful substances from entering the body and protecting internal organs. It also helps regulate body temperature to some extent, but that is not its primary function. The skin does not produce vitamin D; this is mainly done by the liver and kidneys. Red blood cells are produced in the bone marrow, not the skin.

Correct Answer: A

Rationale: The primary role of hemoglobin in red blood cells is to carry oxygen. Hemoglobin binds to oxygen in the lungs and transports it to tissues throughout the body. This is essential for cellular respiration and energy production. Choices B, C, and D are incorrect because hemoglobin's main function is oxygen transport, not carrying nutrients, carbon dioxide, or waste products. Oxygen transport is crucial for the body's overall function and survival.