Biology-Online • View topic - melatonin

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Postby kk » Sat Apr 14, 2012 6:18 am

I know that melatonin hormone is released by the pineal gland upon the fall of the night, so we can go to sleep easier. But nowhere I could find how the daily release of this hormone is triggered in humans that live on the north pole or so, so the sun wouldn't go down for 6 months and then it would be dark for another six months. It assumes the existence of other stimulatory mechanisms for the daily melatonin release...
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Postby nikolebellamy » Sat Apr 28, 2012 7:45 pm

but at the same time us organisms will adapt to our surrounding enviroment.......your body will get on a set schedule......just as if you began to work a graveyard shift you have to learn to sleep through the daylight....your body will make what adjustments are needed to reach a homeostasis level
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Postby JackBean » Mon May 07, 2012 9:20 am

Isn't light only correcting the circadial rhythm?

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