Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 46 - The Mammalian Nervous System: Structure and Higher Functions - 46.3 - Higher Brain Functions Involve Integration of Multiple Systems - 46.3 Recap - Learning Outcomes - Page 998: 1

Answer

Wakefulness and drowsiness are regulated by melatonin, which is secreted by the pineal gland. Melatonin is released partially to maintain the circadian rhythm, a of sleep and wake cycle that helps define our internal clock.

Work Step by Step

Wakefulness and drowsiness are regulated by melatonin, which is secreted by the pineal gland. Melatonin is released partially to maintain the circadian rhythm, a of sleep and wake cycle that helps define our internal clock.
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