NRCMA Anatomy and Physiology 1

Question 1

Which layer of the heart muscle is responsible for the pumping action?

Accepted Answer

Myocardium

Answer

The myocardium is the middle, thick muscular layer of the heart wall composed of cardiac muscle cells responsible for the contraction that pumps blood.

Question 2

The normal pH range of human arterial blood is:

Accepted Answer

7.35–7.45

Answer

Normal arterial blood pH is 7.35–7.45. Values below 7.35 indicate acidosis; values above 7.45 indicate alkalosis.

Question 3

Which organ is responsible for producing insulin?

Accepted Answer

Pancreas

Answer

The pancreatic islets of Langerhans contain beta cells that produce and secrete insulin in response to rising blood glucose levels.

Question 4

The anatomical position reference term 'proximal' means:

Accepted Answer

Closer to the point of attachment or origin

Answer

Proximal describes a structure closer to the point of origin or attachment (e.g., the proximal humerus is the shoulder end of the upper arm bone).

Question 5

The primary function of erythrocytes (red blood cells) is to:

Accepted Answer

Transport oxygen and carbon dioxide

Answer

Erythrocytes contain hemoglobin, which binds oxygen in the lungs and releases it in tissues, also carrying a portion of CO2 back to the lungs.

(NRCMA) Nationally Registered Certified Medical Assistant Practice Test

(NRCMA) Nationally Registered Certified Medical Assistant Practice Test

NRCMA Anatomy and Physiology 1