CNA Anatomy and Physiology Basics 5

Question 1

Which part of the nervous system controls involuntary functions like heart rate and digestion?

Accepted Answer

Autonomic nervous system

Answer

The autonomic nervous system regulates involuntary body functions including heart rate, breathing, digestion, and glandular activity.

Question 2

The diaphragm is a dome-shaped muscle that primarily functions to:

Accepted Answer

Contract and flatten to allow inhalation

Answer

When the diaphragm contracts and flattens, it increases the volume of the thoracic cavity, causing air to rush into the lungs during inhalation.

Question 3

The term 'homeostasis' refers to:

Accepted Answer

The body's ability to maintain a stable internal environment

Answer

Homeostasis is the body's process of maintaining a stable, balanced internal environment despite changes in the external environment.

Question 4

Which blood vessels carry blood AWAY from the heart?

Accepted Answer

Arteries

Answer

Arteries carry blood away from the heart to the body's tissues; most arteries carry oxygenated blood except the pulmonary arteries.

Question 5

The large intestine's primary role in digestion is to:

Accepted Answer

Absorb water and electrolytes from undigested material

Answer

The large intestine absorbs water and electrolytes from the remaining indigestible food matter, forming solid stool.

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