MCAT Biology Question 141: Answer and Explanation
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Question: 141
6. In the nephron, amino acids enter the vasa recta via the process of:
- A. filtration.
- B. secretion.
- C. excretion.
- D. reabsorption.
Correct Answer: D
Explanation:
Essential substances, such as glucose, salts, amino acids, and water, are reabsorbed from the filtrate and returned to the blood in the vasa recta. In general, reabsorption refers to the movement of solutes from the filtrate back into the blood.