Which of the following would stimulate the secretion of melatonin from the pineal gland?Multiple ChoiceDarknessHigh blood glucoseLight raysHypothermia
Question
Which of the following would stimulate the secretion of melatonin from the pineal gland?
- Dark
- High blood glucose
- Light rays
- Hypothermia
Solution
Darkness would stimulate the secretion of melatonin from the pineal gland.
Here's why:
The pineal gland is a small endocrine gland in the brain of most vertebrates. It produces melatonin, a hormone that affects the modulation of wake/sleep patterns and seasonal functions.
The production and release of melatonin from the pineal gland is stimulated by darkness and inhibited by light. When it gets dark, more melatonin is produced. When it gets light, the production of melatonin is stopped.
Therefore, darkness would stimulate the secretion of melatonin from the pineal gland.
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