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The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone
A
Adrenaline
B
Melatonin
C
Calcitonin
D
Prolactin
Detailed Solution
The pineal gland, located on the dorsal side of the forebrain, secretes the hormone melatonin.
Melatonin plays a very important role in the regulation of the 24-hour (diurnal) rhythm of the body; it helps in maintaining the normal rhythm of the sleep-wake cycle and body temperature.
It also influences metabolism, pigmentation, the menstrual cycle and defence capability.
Adrenaline is the emergency hormone of the adrenal medulla, calcitonin lowers blood calcium, and prolactin regulates the growth of mammary glands and milk formation.
Hence the sleep-wake cycle is regulated by melatonin.
Melatonin plays a very important role in the regulation of the 24-hour (diurnal) rhythm of the body; it helps in maintaining the normal rhythm of the sleep-wake cycle and body temperature.
It also influences metabolism, pigmentation, the menstrual cycle and defence capability.
Adrenaline is the emergency hormone of the adrenal medulla, calcitonin lowers blood calcium, and prolactin regulates the growth of mammary glands and milk formation.
Hence the sleep-wake cycle is regulated by melatonin.