Multiple Choice
In a typical healthy adult, the formed elements (erythrocytes, leukocytes, and platelets) make up approximately what percentage of whole blood volume?
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17. The Blood
Introduction To Blood
Multiple Choice
In the context of blood composition, what is the liquid portion of blood called?
A
Hematocrit
B
Formed elements
C
Serum
D
Plasma
Verified step by step guidance1
Understand that blood is composed of two main parts: the liquid portion and the cellular components.
Recognize that the cellular components, also called formed elements, include red blood cells, white blood cells, and platelets.
Know that hematocrit refers to the percentage of blood volume occupied by red blood cells, not the liquid portion.
Differentiate between plasma and serum: plasma is the liquid portion of blood that contains water, proteins, nutrients, hormones, and waste products, while serum is plasma without clotting factors.
Conclude that the liquid portion of blood, which carries cells and other substances, is called plasma.
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