Phlebotomy Test Phlebotomy Anatomy and Physiology 3

Question 1

What is the normal pH range of human blood?

Accepted Answer

7.35–7.45

Answer

Normal blood pH is maintained between 7.35 and 7.45; values below this indicate acidosis and values above indicate alkalosis.

Question 2

Capillary blood specimens are most often collected from which site in adult patients?

Accepted Answer

Fingertip (finger stick)

Answer

In adults, the capillary puncture is most commonly performed on the fleshy tip of the third or fourth finger (ring or middle finger).

Question 3

Which component of blood is responsible for the immune response and fighting infection?

Accepted Answer

Leukocytes

Answer

Leukocytes (white blood cells) are the immune cells of the blood that identify and destroy pathogens, foreign substances, and abnormal cells.

Question 4

What term describes the collapse or rolling of a vein during venipuncture?

Accepted Answer

Vein collapse

Answer

Vein collapse occurs when too much suction is applied, causing the vein walls to cave in and obstruct blood flow into the needle.

Question 5

The median nerve runs near which structure frequently accessed during venipuncture?

Accepted Answer

Basilic vein

Answer

The median nerve lies close to the basilic vein in the antecubital fossa, which is why this vein is the least preferred draw site.

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