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: A

Rationale: The primary function of the integumentary system is to protect the body from external damage. The skin acts as a physical barrier against harmful substances, UV radiation, and pathogens. It also helps regulate body temperature through sweat production and insulation. Vitamin D production occurs in the skin but is not the primary function. Red blood cells are produced in the bone marrow, not in the integumentary system.

Correct Answer: B

Rationale: The correct answer is B: To protect internal organs and provide support. The skeletal system consists of bones that serve as the framework of the body, supporting and protecting internal organs. Bones also provide structure for muscles to attach to, enabling movement. Choices A, C, and D are incorrect because the skeletal system does not produce red blood cells (that's the function of the bone marrow), regulate body temperature (that's the role of the skin and hypothalamus), or store calcium (bones do store calcium, but it's not the main function of the skeletal system).

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: B

Rationale: The primary function of the circulatory system is to transport oxygen and nutrients throughout the body. The heart pumps blood containing oxygen and nutrients to all cells and tissues. This process supports cellular functions and provides energy. Hormone production (A) is mainly regulated by the endocrine system. Fighting infections (C) is primarily the role of the immune system. Regulating body temperature (D) is primarily controlled by the thermoregulatory system. Overall, the circulatory system's main role is the transport of oxygen and nutrients, making choice B the correct answer.