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

question 76

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

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Definitions:

Saltatory Conduction

Fast propagation of an action potential at successive nodes of Ranvier; saltatory means “leaping.”

Nodes Of Ranvier

Gaps in the myelin sheath around nerve fibers where the axon is exposed and action potentials are regenerated.

Sodium-Potassium Pumps

Membrane proteins that help maintain cellular homeostasis by actively transporting sodium out of cells and potassium into cells.

Multiple Sclerosis

An autoimmune disease that affects the brain and spinal cord, leading to demyelination, inflammation, and damage to nerve cells.