Endocrine regulation · USMLE Step 1

Which of the following hormones is primarily regulated by a humoral stimulus related to blood osmolarity rather than hormonal feedback?

  1. TSH
  2. ACTH
  3. ADH
  4. FSH
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Correct answer: ADH

ADH (vasopressin) release is regulated by osmoreceptors in the hypothalamus sensing changes in blood osmolarity (a humoral stimulus), prompting water reabsorption to correct osmolarity.

Difficulty: Medium Question 9 of 23

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