Quizlet HESI A2 Anatomy and Physiology

Correct Answer: B

Rationale: The primary function of the lymphatic system is to remove carbon dioxide from the body. Lymphatic vessels collect excess fluid and waste products from tissues and transport them back to the bloodstream for elimination. This process helps maintain fluid balance and removes metabolic waste. The other choices are incorrect because: A: Transporting oxygen to cells is primarily done by the circulatory system. C: Hormone production is mainly regulated by the endocrine system. D: Nutrient transport is primarily the role of the digestive system and the circulatory system.

Correct Answer: A

Rationale: The correct answer is A: Transporting oxygen. Hemoglobin is a protein in red blood cells that binds to oxygen in the lungs and carries it to tissues throughout the body. This process is essential for cellular respiration and energy production. The other choices are incorrect because hemoglobin does not primarily function in carrying nutrients, clotting blood, or removing carbon dioxide from the blood. Transporting oxygen is the main and crucial role of hemoglobin in the blood.

Correct Answer: A

Rationale: The correct answer is A: To filter waste from the blood. The kidneys function to filter waste products, excess fluids, and electrolytes from the blood to form urine. This process helps maintain the body's internal environment and remove harmful substances. Choice B is incorrect because urine is the end product of the kidney's filtration process, not its primary function. Choice C is incorrect because while the kidneys do play a role in regulating blood pressure, it is not their primary function. Choice D is incorrect because the kidneys primarily excrete waste rather than absorb nutrients.

Correct Answer: A

Rationale: Vitamin C is the correct answer as it enhances the absorption of non-heme iron found in plant-based foods. It forms a strong bond with iron, making it easier for the body to absorb. Vitamin D helps with calcium absorption, Vitamin K is crucial for blood clotting, and Vitamin B12 is important for nerve function and red blood cell production. However, they do not directly assist in iron absorption like Vitamin C does.

Correct Answer: B

Rationale: The correct answer is B: Neuroglia. Nerve tissue is composed of neurons, which are responsible for transmitting electrical signals, and neuroglia, which are supportive cells that provide structure and nutrients to neurons. Osteoblasts (A) are bone-forming cells, osteocytes (C) are mature bone cells, and arterioles (D) are small blood vessels. Neuroglia are crucial for the proper functioning of neurons, making them the correct choice in this context.