Wednesday, March 3, 2010

Why Body is less thirsty at night??

Our brain cells collude and keep us hydrated when we sleep, which prevents nightly dehydration or frequent urination. This is the reason why our body is less thirsty at night, says the scientists.

The body's internal clock helps regulating a hormone which can store water in the body, during the night. This help us to control the water regulation, during sleep.

The body regulates its water content mainly by balancing water intake through thirst and water loss through urine production. The low water levels excite a group of cells called osmosensory neurons, which direct another set of neurons to release a hormone called Vasopressin. Vasopressin instructs the body to store water, into the bloodstream.

Vasopressin levels increase during sleep and it will result in more water retention and less urine production during sleep.

The studies are conducted by the Neurophysiologists from the McGill University Health Centre in Montreal, Canada.

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