After Cautiously Walking Home and Arriving Safely from Her Late-Night

question 24

Multiple Choice

After cautiously walking home and arriving safely from her late-night class,Selma notices her heart rate slows,as does her breathing.This automatic return to a normal state is due to the activity of the:

• A) somatic nervous system
• B) sympathetic system
• C) parasympathetic system
• D) endocrine system

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Definitions:

Axon

A long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body.

Nucleus

A membrane-bound organelle found in eukaryotic cells that contains most of the cell's genetic material.

Cardiac Muscle

Specialized, involuntary muscle tissue found only in the heart, responsible for pumping blood throughout the body.

Smooth Muscle

A type of muscle found in the walls of internal organs, such as the stomach and intestines, that contracts involuntarily.