MCAT Biochemistry Question 74: Answer and Explanation

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Test Information

Question: 74

14. Which of the following statements regarding prostaglandins is FALSE?

  • A. Prostaglandins regulate the synthesis of cAMP.
  • B. Prostaglandin synthesis is inhibited by NSAIDs.
  • C. Prostaglandins affect pain, inflammation, and smooth muscle function.
  • D. Prostaglandins are endocrine hormones, like steroid hormones.

Correct Answer: D

Explanation:

Prostaglandins are paracrine or autocrine hormones, not endocrine—they affect regions close to where they are produced, rather than affecting the entire body. Think of the swelling that happens when you bash your knee into your desk: your knee will swell, turn red, and possibly bruise. Luckily, however, your entire body won’t swell as well.

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