Melatonin release from the pineal gland is stimulated by ________ and inhibited by ________

General
1

melatonin release from the pineal gland is stimulated by ________ and inhibited by ________.

2

Melatonin release from the pineal gland is stimulated by ________ and inhibited by ________.

Answer:

Melatonin release from the pineal gland is stimulated by darkness and inhibited by light.

Explanation:

  1. Darkness:

    • Melatonin production is closely linked to the light-dark cycle. In the absence of light, the suprachiasmatic nucleus (SCN) of the hypothalamus signals the pineal gland to produce and release melatonin. This process typically begins in the evening, helping to promote sleepiness.

  2. Light:

    • Exposure to light, especially blue light, inhibits the production of melatonin. Light signals through the retina suppress melatonin release by sending signals to the SCN, which consequently suppresses the activity of the pineal gland. This helps regulate the sleep-wake cycle and keeps us alert during the daytime.