alleryStart learning →Which hormone is named as an important regulator of sleep-wake cycles?
AMelatonin
BInsulin
CThyroxine
DAdrenaline
Answer & Solution
Correct answer: A. Melatonin
1. One hormone is singled out for the sleep-wake cycle.
2. One important regulator of sleep-wake cycles is the hormone melatonin.
3. It works alongside the brain's clock in the suprachiasmatic nucleus.
4. Insulin, thyroxine and adrenaline regulate other body systems.
_Source: OpenStax Psychology 2e (CC BY 4.0), Ch 4 'States of Consciousness', sections 4.1-4.6_
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