The hormone , which is secreted by the pineal gland, influences the sleep–wakefulness cycles.

Biology

2 answers:

Bess [88]3 years ago

7 0

Melatonin is the answer

KonstantinChe [14]3 years ago

6 0

The hormone described above is the hormone Melatonin.
Melatonin is a hormone secreted by the pineal gland in the brain, which helps regulate other hormones and maintains the body's circadian rhythm. This rhythm is an internal 24 hour clock that plays a critical role when we fall asleep and when awake. When it is dark the body releases more melatonin.

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