Phlebotomy Test Phlebotomy Anatomy and Physiology

Question 1

Which vein is most commonly used for venipuncture in the antecubital fossa?

Accepted Answer

Median cubital vein

Answer

The median cubital vein is the preferred site for venipuncture because it is large, well-anchored, and least painful.

Question 2

What is the liquid portion of blood that remains after clotting has occurred?

Accepted Answer

Serum

Answer

Serum is the liquid portion of blood that remains after the clot has formed and been removed, whereas plasma still contains clotting factors.

Question 3

Which type of blood vessel carries oxygenated blood away from the heart?

Accepted Answer

Arteries

Answer

Arteries carry oxygenated blood away from the heart to the body's tissues, with the exception of the pulmonary artery.

Question 4

What is the approximate percentage of the adult body's blood volume made up by red blood cells?

Accepted Answer

40–45%

Answer

Red blood cells (erythrocytes) constitute approximately 40–45% of total blood volume, a measurement known as the hematocrit.

Question 5

Which cellular component of blood is primarily responsible for oxygen transport?

Accepted Answer

Erythrocytes

Answer

Erythrocytes (red blood cells) contain hemoglobin, which binds and transports oxygen from the lungs to tissues throughout the body.

Phlebotomy Practice Test Practice Test