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GCSE Psychology · key term
A hormone released by the pineal gland, especially at night, that promotes sleepiness and helps regulate the sleep–wake cycle.
Used by OCR
Paper 2
Revise: Functions and Disorders of SleepThe pineal gland produces melatonin, a hormone that promotes sleepiness and helps regulate sleep timing.
A hormone whose release normally increases at night, helping signal that it is time to sleep.
Explain the whole sleep-regulation pathway: light information reaches the SCN, which influences the pineal gland’s release of melatonin.
Distinguish the hypothalamus, which helps regulate sleep–wake rhythms, from melatonin, a hormone involved in signalling night-time.
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