Why is it important for a postoperative patient to get enough sleep after being discharged from the hospital?

A) Sleep restores biological processes.
B) Sleep stimulates appetite on waking.
C) Sleep causes a mental and physiological calm.
D) Sleep produces dreams that decrease epinephrine.

Because the patient is postoperative,the primary reason for sleep is to help the body to heal by restoring biological processes.Sleep allows the body to restore biological processes.During deep slow-wave (NREM N3)sleep,the body releases human growth hormone for the repair and renewal of epithelial and specialized cells such as brain cells.Protein synthesis and cell division for the renewal of tissues also occur during rest and sleep.The basal metabolic rate is lowered during sleep,which conserves the body's energy supply.REM sleep is important for cognitive restoration.During REM sleep,patients experience rapid eye movement,fluctuation in heart and respiratory rate,increased/fluctuating blood pressure,loss of skeletal muscle tone,and increase in gastric secretions.(This is not a mental and physical calm.)During REM sleep,there is increased oxygen consumption and epinephrine is released,not decreased.Sleep does not cause an increase in appetite as the metabolic rate slows down.