Which gland regulates the circadian rhythm?

Which gland regulates the circadian rhythm?

  • Pineal gland
  • Pituitary gland
  • Adrenal glands
  • Thyroid gland
The correct option is: Pineal gland
The pineal gland regulates the circadian rhythm by secreting melatonin, a hormone that helps control sleep-wake cycles.
Tags: pineal glandcircadian rhythmmelatonin