When her son fails to arrive home as expected,Elena fears he has been in an accident.Both her heart and respiration rate remain elevated until she sees him come safely through the door.Her body soon returns to normal due to the action of her ________ nervous system.

A) parasympathetic
B) sympathetic
C) central
D) somatic

Parasympathetic Nervous System

The part of the autonomic nervous system that is responsible for conserving energy and promoting relaxation processes.

Elevated Heart Rate

A condition where the heart beats faster than normal, which could be due to exercise, stress, or medical conditions.

Respiration Rate

Respiration Rate is the number of breaths a person takes per minute, which is a critical vital sign indicating the health and wellbeing of an individual.