SLEEP:-

 SLEEP:-

reversible state of alterd consciousnes which reduced physical activities and reduce excitability.

significance:-

i)muscle relaxation

ii)consolidation of memmory

iii)promotes growth

iv)decrease in heart rate,blood pressure .

types:-

NREM SLEEP	REM SLEEP
No rapid eye movement	Rapid eye movement present.
Each cycle last abou 70 minutes	5-30min
Begins with NREM and followed by REM	Always alternate with NREM
Occupies major part of sleep	ECG similar to awake so,called as paradoxical sleep