The Adrenal
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∙ 11y agoThe pineal gland releases melatonin, which regulates sleep/wake cycles. The adrenal glands release epinephrine, which is the fight or flight hormone.
Pineal gland at the dorsal aspect of brain secreates the hormone melatonin, that may regulate wake up and sleep patterns.
The pineal body which is located posterior to the hypothalamus is a smooth, fingertip-shaped tissue that secretes the hormone melatonin. It maintains the body's internal clock and the 24-hour wake-sleep cycle and regulates the onset and duration of sleep.
The pineal gland responds to light and secretes melatonin. Melatonin controls sleep and wake patterns. so the pineal is activated by light creating sleep and wake patterns pretty much what i said earlier.
pineal gland
Function of the pineal body/gland is endocrine. This contributes the the alertness or consciousness of one's self and produces "melatonin" which regulates the sleep/wake patterns. The name derives from its shape. It produces melatonin that helps to regulate sleep/wake functions, and even seasonal functions (e.g. more wakefulness and productivity in the summer, versus more restfulness - and, in some animals, hibernation - in the winter).
The pineal gland is an endocrine gland located in the center of the brain (of vertebrate animals). It resembles a pine cone, which is the origin of its name. This gland produces serotonin and derivative melatonin. Melatonin is a hormone that regulates sleep patterns.
The hormone melatonin, which is secreted by the pineal gland.
The hormone melatonin, which is secreted by the pineal gland.
your body has a gland called the pituatary gland and that gland controld your sleep so when u go to bed your pituatary gland is not ready to control your body at the "sleeping mode" so when you wake up your body is then ready to go to the "sleeping mode'
The pineal gland produces hormones which regulate wake/sleep cycles.
http://www.answers.com/topic/body-rhythm-physiology