Multiple Choice
In a typical healthy adult, approximately what percentage of whole blood volume is composed of plasma?
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17. The Blood
Introduction To Blood
Multiple Choice
Which of the following lists correctly identifies the formed elements of blood?
A
Plasma proteins, water, and electrolytes
B
Erythrocytes, leukocytes, and platelets
C
Oxygen, carbon dioxide, and nutrients
D
Albumin, globulins, and fibrinogen
Verified step by step guidance1
Understand that blood is composed of two main components: plasma and formed elements. Plasma is the liquid portion, while formed elements are the cellular components suspended in plasma.
Recall that formed elements specifically refer to the cells and cell fragments in blood, which include erythrocytes (red blood cells), leukocytes (white blood cells), and platelets (cell fragments involved in clotting).
Identify that plasma proteins (such as albumin, globulins, and fibrinogen), water, electrolytes, oxygen, carbon dioxide, and nutrients are components of plasma, not formed elements.
Compare each option to the definition of formed elements: only the list containing erythrocytes, leukocytes, and platelets correctly names the formed elements of blood.
Conclude that the correct answer is the list that includes erythrocytes, leukocytes, and platelets, as these are the cellular components that make up the formed elements.
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