Phlebotomy Test Phlebotomy Anatomy and Physiology 2

Question 1

What is the function of platelets (thrombocytes) in the blood?

Accepted Answer

Assist in blood clotting

Answer

Platelets are cell fragments that aggregate at sites of vessel injury to form a plug and initiate the clotting cascade to stop bleeding.

Question 2

Which layer forms the middle portion of centrifuged whole blood between plasma and red blood cells?

Accepted Answer

Buffy coat

Answer

The buffy coat is the thin white or gray layer that contains white blood cells and platelets, located between the plasma and the packed red blood cells after centrifugation.

Question 3

A patient has a normal adult hematocrit. Which range best represents this value for males?

Accepted Answer

38–50%

Answer

Normal hematocrit for adult males is approximately 41–53%, so the range 38–50% is the closest correct answer among the choices.

Question 4

Which vein in the antecubital area is considered the least preferred due to its proximity to the brachial artery?

Accepted Answer

Basilic

Answer

The basilic vein is least preferred because it lies near the brachial artery and median nerve, increasing the risk of accidental arterial puncture or nerve injury.

Question 5

What type of circulation carries blood from the heart to the lungs and back?

Accepted Answer

Pulmonary circulation

Answer

Pulmonary circulation transports deoxygenated blood from the right ventricle to the lungs for oxygenation, then returns it to the left atrium.

Phlebotomy Practice Test Practice Test

Phlebotomy Practice Test Practice Test

Phlebotomy Test Phlebotomy Anatomy and Physiology 2