2006-10-31 08:30:06 · 14 answers · asked by Aqua S 1 in Health ➔ Other - Health
Sleep is the state of natural rest observed in most mammals, birds, fish, and even invertebrates such as the fruitfly Drosophila. It is characterized by a reduction in voluntary body movement, decreased reaction to external stimuli, an increased rate of anabolism (the synthesis of cell structures), and a decreased rate of catabolism (the breakdown of cell structures). In humans, mammals and many other animals which have been studied, such as fish, birds, mice and fruitflies, sleep is necessary for life. The capability for arousal from sleep is a protective mechanism and also necessary for health and survival. Technically, sleep is different from unconsciousness.
2006-10-31 08:31:48 · answer #1 · answered by Anonymous · 5⤊ 1⤋
sleeping is our body's requirement. In order to have a healthy and proper functioning of our body, we need to have a proper sleep.
2006-10-31 16:39:32 · answer #2 · answered by curiouz 1 · 0⤊ 0⤋
When it begins to get dark outside, our brains secrete chemicals into our bloodstream called melatonin to let us know that we need to sleep. So we sleep! Without sleep, our brains could in all theory, stop functioning properly and cause us to do/say/or hear things that we shouldnt!
2006-10-31 16:30:42 · answer #3 · answered by Angel Eve 6 · 0⤊ 2⤋
Without sleep your mind does not function properly and you go crazy (it happened to a co-worker who was taking medication)
2006-10-31 16:32:11 · answer #4 · answered by Anonymous · 0⤊ 1⤋
To replenish their body when it gets tired, repair cells and recover from the stress of the day.
2006-10-31 16:32:49 · answer #5 · answered by guysmithdenise 3 · 0⤊ 0⤋
Rejuvenation.
2006-10-31 16:31:22 · answer #6 · answered by Anonymous · 0⤊ 2⤋
Because we're tired of answering stupid *ss questions
2006-10-31 16:31:56 · answer #7 · answered by Ken 3 · 1⤊ 1⤋
Its a brain reload.
2006-10-31 16:32:03 · answer #8 · answered by Anonymous · 0⤊ 1⤋
Because they are tired.
2006-11-01 03:16:40 · answer #9 · answered by kyles_aunt_jenny_age_24 1 · 0⤊ 0⤋
Because if u dont, well we have too!
2006-10-31 16:39:36 · answer #10 · answered by HIGHLY FAVORED 3 · 0⤊ 0⤋