Endocrine regulation · USMLE Step 1

Which of the following glands is considered a ‘secondary’ endocrine gland (i.e., not primarily endocrine) but still contributes to endocrine regulation?

  1. Adrenal gland
  2. Thyroid gland
  3. Pancreas
  4. Pituitary gland
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Correct answer: Pancreas

The pancreas is often considered a secondary endocrine gland — its main function is digestive (exocrine), but its islets secrete hormones (insulin, glucagon) contributing to endocrine regulation.

Difficulty: Medium Question 16 of 23

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