Neuroendocrine integration · Physiology

The circadian rhythm of cortisol secretion is regulated by:

  1. Peripheral adrenal clocks acting alone
  2. Hypothalamic suprachiasmatic nucleus
  3. Pineal gland melatonin acting alone
  4. Renal feedback mechanisms
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Correct answer: Hypothalamic suprachiasmatic nucleus

The suprachiasmatic nucleus of the hypothalamus regulates circadian rhythms. It influences cortisol secretion via the HPA axis.

Difficulty: Medium Question 11 of 20

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