Question

Ch 7 Q 1 what do you understand by sleep​

Answer 1

Explanation:

Sleep is a physiological behavior that is common in all animal species. It forms around one third of a human life. It is not known clearly the exact functions of sleep but it seems to be essential for survival as prolonged sleep deprivation leads to severe physical impairment followed by cognitive loss and eventually death.

Answer 2

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• ᴀ ᴅʏɴᴀᴍɪᴄ ᴀᴄᴛɪᴠɪᴛʏ. ɴᴇʀᴠᴇ-sɪɢɴᴀʟɪɴɢ ᴄʜᴇᴍɪᴄᴀʟs ᴄᴀʟʟᴇᴅ ɴᴇᴜʀᴏᴛʀᴀɴsᴍɪᴛᴛᴇʀs ᴄᴏɴᴛʀᴏʟ ᴡʜᴇᴛʜᴇʀ ᴡᴇ ᴀʀᴇ ᴀsʟᴇᴇᴘ ᴏʀ ᴀᴡᴀᴋᴇ ʙʏ ᴀᴄᴛɪɴɢ ᴏɴ ᴅɪғғᴇʀᴇɴᴛ ɢʀᴏᴜᴘs ᴏғ ɴᴇʀᴠᴇ ᴄᴇʟʟs, ᴏʀ ɴᴇᴜʀᴏɴs, ɪɴ ᴛʜᴇ ʙʀᴀɪɴ.