Question
The 24 hour (diurnal) rhythm of our body such as the sleep -wake cycle is regulated by the hormone
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Calcitonin
-
prolactin
-
adrenaline
-
melatonin
Solution
D.
melatonin
Melatonin, also know as chemically N-acetyl 5- methoxy tryptamine is a naturally occurring compound found in animals, plants and microbes. In animals, circulating levels of the hormone melatonin vary in a daily cycle, thereby allowing the entrainment of the circadian rhythms of several biological functions.
