Mark's Father Had Triple Bypass Surgery a Week Ago and Has

Multiple Choice

Mark's father had triple bypass surgery a week ago and has been told by his doctors to reduce the stress in his life in general and at least for the next several weeks try to maintain calmness about him.After opening a letter from school containing Mark's poor semester grades,his father does his biofeedback exercises in an effort to return his blood pressure to normal and his muscles back to relaxation.For this to work,a particular nervous system is working overtime.This is the ________________ nervous system.

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