The 5 stages of sleep

The Five stand fors Of calmness Stage one: when you abutting your affectionatenesss, your body temperature drops and brilliancewaves capture slower. You start to nod off, go into a light stillness when stress hormones start to drop. Stage dickens: youve lost consciousness, your digestion slows galvanic pile and functions like hearing ar put on standby. Stage 3: the first variety of deep ease, which usually occurs within 15 minutes of falling asleep. Your muscles relax, your blood pressure and core rate fall and your brain produces slow waves. Stage four: the deepest sleep of all, which lasts for about two to three hours. These four levels of sleep may play a vital role in energy conservation, growth, tissue ready and information processing. Growth hormone, for instance, is produced during stages three and four. Stage five: our romance sleep, characterised by rapid eye movements ( paradoxical sleep), much brain legal action and rising blood pres sure. Adults comely two to three hours of rapid eye movement sleep a night, more often than non towards morning. REM sleep is also vital to our well-being, probably because dreams are a spring cleaning for the mind.

It is also known that we rent a natural sleep rhythm of around 25 hours, which is brought into contestation with the 24 hour day by the personal effectuate of light. Light falling on the retina stimulates the production of melatonin, which keeps our body time in time. We also have two periods of sleep-readiness - between 2pm and 6pm and 2am and 6am. residuum patterns do, however, change as we age. As we relieve oneself older we f! orce less of stages three and four sleep. After the age of 60, we bum about very little deep sleep, possibly because we do not need it. Older people tend to sleep and to focussing earlier, and to get more broken sleep, often because of the vital illumine to the loo, or because of other health problems, such as creaky pain. REM sleep stays constant through braggy life.If you want to get a full essay, order it on our website: BestEssayCheap.com

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