Endocrine regulation · USMLE Step 1

Which gland pair is correctly matched with its primary endocrine output and a major physiological function?

  1. Pancreas → cortisol → stress adaptation
  2. Adrenal cortex → thyroid hormones → metabolic rate
  3. Thyroid gland → T3/T4 → basal metabolic rate regulation
  4. Pituitary posterior lobe → insulin → blood glucose control
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Correct answer: Thyroid gland → T3/T4 → basal metabolic rate regulation

The thyroid gland secretes T3 and T4, which are key regulators of basal metabolic rate; this is a central endocrine function.

Difficulty: Medium Question 22 of 23

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