Quizlet HESI A2 Anatomy and Physiology - Nurselytic

Correct Answer: B

Rationale: The correct function of the lungs in the respiratory system is to exchange gases. The lungs facilitate the exchange of oxygen and carbon dioxide between the air we breathe in and the blood, ensuring oxygen is absorbed and carbon dioxide is removed during respiration.
Choice A is incorrect as the kidneys, not the lungs, filter blood.
Choice C is incorrect as energy production primarily occurs in cells, not in the lungs.
Choice D is incorrect as waste removal, such as the excretion of carbon dioxide, is a function of the lungs, but the primary function is the exchange of gases.

Correct Answer: B

Rationale: The main function of the skeletal system is to provide structural support, protect internal organs, enable movement, and maintain the body's form.
Choice A, '
To produce red blood cells,' is incorrect as the skeletal system's role in blood cell production is through the bone marrow, not its main function.
Choice C, '
To regulate body temperature,' is incorrect as the skeletal system is not primarily responsible for regulating body temperature.
Choice D, '
To store calcium,' is partially correct as the skeletal system does store calcium but this is not its main function; instead, it is essential for bone strength and muscle function.

Correct Answer: A

Rationale: The correct answer is A: '
To filter waste from the blood.' The primary function of the kidneys in the urinary system is to filter waste products and excess substances from the blood, forming urine, which is then excreted from the body. This process helps maintain the body's internal environment by regulating the balance of electrolytes, fluid levels, and eliminating metabolic waste products.

Choices B, C, and D are incorrect because while the kidneys do produce urine, regulate blood pressure, and maintain fluid balance, their primary function within the urinary system is the filtration of waste from the blood.

Correct Answer: C

Rationale: Vitamin D is essential for the absorption of calcium in the intestines, aiding in the maintenance of strong bones and teeth. It helps regulate calcium and phosphorus levels in the body, supporting bone health and preventing conditions like osteoporosis. Vitamin A (
Choice
A) is important for vision and immune function, not specifically for calcium absorption. Vitamin C (
Choice
B) is crucial for collagen synthesis and immune function but is not directly involved in calcium absorption. Vitamin K (
Choice
D) plays a role in blood clotting and bone health, but it is not primarily responsible for calcium absorption.

Correct Answer: A

Rationale: The correct answer is A: '
To filter waste from the blood.' The primary function of the kidneys in the urinary system is to filter waste products and excess substances from the blood, forming urine, which is then excreted from the body. Kidneys play a crucial role in maintaining the body's overall balance by filtering out waste, regulating fluid levels, and helping in the elimination of toxins.

Choices B, C, and D are incorrect because while the kidneys do produce urine, regulate blood pressure, and help in nutrient absorption indirectly, their primary function is the filtration of waste from the blood.