y do we sleep?

Question

y do we sleep. ive heard some stuff that sleeping doesnt give uno more engery than toast so y do we sleep?

Answer 1

The two biggest reasons are:
1. To let your body rest and repair itself from all the damage you've done to it during the day. During sleep, your body removes toxins from your blood, repairs muscles, rebuilds chemical and water levels in the cells, etc.Sleep periods are also when your body grows, if you're a child.
2. To give your brain a chance to assimilate all the things you;ve learned that day, not to mention to give it a break too, although the brain never shuts down completely. If it did, we would stop breathing and never wake up.

Answer 2

It physiological, our biological clock
Our cells become refreshed by the release of melantonin
an very strong antioxidant

Because sleeping and being in the dark in general allows to manufacture and release melantonin, a hormone and neurotransmitter. lack of sleep can cause many disorders but is linked to cancer, immune disorders, cardiovascular diseases, depression, seasonal affective disorder (SAD), and sexual dysfunction

Nobel Prize laureate Julius Axelrod performed many of the seminal experiments that elucidated the role of melatonin and the pineal gland in regulating sleep-wake cycles (circadian rhythms). In humans, melatonin is produced by the pineal gland, a gland about the size of a pea, that is located in the center of the brain.

Normally, the production of melatonin by the pineal gland is inhibited by light and permitted by darkness. For this reason melatonin has been called "the hormone of darkness". The secretion of melatonin peaks in the middle of the night, and gradually falls during the second half of the night. Until recent history, humans in temperate climates were exposed to up to eighteen hours of darkness in the winter. In this modern world, artificial lighting typically reduces this to eight hours or less per day all year round. Even low light levels inhibit melatonin production to some extent, but over-illumination can create significant reduction in melatonin production. Reduced melatonin production has been proposed as a likely factor in the significantly higher cancer rates in night workers.

Answer 3

when w esleep our bodies use up all the access food in our bodies to produce energy, our muscles need rest too our brains need rest. so go to sleep and take a multi vitimin to purge out all the oxidents in you as you sleep.

Answer 4

All of the above

and... children sleep to give parents a rest

- thank you God!

Answer 5

we sleep because the brain needs to rest if you go too long without sleep your brain starts getting messed up and you start seeing things

Answer 6

Sleep, wish I could! Toast always burn it... so if you cant sleep come talk all night to me

Answer 7

there was a programme on channel 4 i think which kept ppl up for as long as they could and they went a bit weird after a while....so its to stop you going all mental, like

Answer 8

To recharge our bodies, sleep deprivation is bad.

Answer 9

We sleep cos we cant keep our eyes open thats why! haha

Answer 10

to recouperate our bodies, heal and rest our tired muscles, and i know the brain dont sleep