There is evidence that marine mammals practice unihemisphericsleep: sleep that occurs in only one brain hemisphere at atime, so that while one hemisphere sleeps, the other is awake.Such sleep is essentially unheard of in terrestrial mammals(although common in birds). What might be the advantages ofunihemispheric sleep for a marine mammal?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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There is evidence that marine mammals practice unihemispheric
sleep: sleep that occurs in only one brain hemisphere at a
time, so that while one hemisphere sleeps, the other is awake.
Such sleep is essentially unheard of in terrestrial mammals
(although common in birds). What might be the advantages of
unihemispheric sleep for a marine mammal?

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