the nervous system is a part of the autonomic system that conserves energy by returning the body to a normal…

the nervous system is a part of the autonomic system that conserves energy by returning the body to a normal activity level through a lowered heart rate and blood pressure.
Answer
Brief Explanations:
The parasympathetic nervous system counter - acts the 'fight - or - flight' response of the sympathetic nervous system. It promotes rest and digestion, lowering heart rate and blood pressure to conserve energy.
Answer:
parasympathetic