The 24 hour (diurnal) rhythm of our body,such | vedclass

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(D) : Melatonin is a hormone secreted by the pineal gland in vertebrates. Melatonin secretion is linked to the light-dark cycle of the environment,bei

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melatonin

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(D) : Melatonin is a hormone secreted by the pineal gland in vertebrates. Melatonin secretion is linked to the light-dark cycle of the environment,being highest at night and lowest during the day. This hormone plays a crucial role in regulating the $24$ hour (diurnal) rhythm of our body,including the sleep-wake cycle and body temperature. It also influences metabolism,pigmentation,the menstrual cycle,and our defense capability.

The $24$ hour (diurnal) rhythm of our body,such as the sleep-wake cycle,is regulated by the hormone:

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