Multiple Choice
Approximately how many pints of blood does the average adult human body contain?
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17. The Blood
Introduction To Blood
Multiple Choice
In the context of blood composition, which component is the fluid portion of blood?
A
Leukocytes
B
Platelets
C
Erythrocytes
D
Plasma
Verified step by step guidance1
Step 1: Understand the components of blood. Blood is composed of formed elements (cells and cell fragments) and a fluid portion.
Step 2: Identify the formed elements: Leukocytes (white blood cells), Platelets (cell fragments involved in clotting), and Erythrocytes (red blood cells). These are all cellular components.
Step 3: Recognize that the fluid portion of blood, which carries these formed elements, nutrients, hormones, and waste products, is called plasma.
Step 4: Recall that plasma is a straw-colored liquid that makes up about 55% of total blood volume and serves as the medium for transporting substances throughout the body.
Step 5: Conclude that among the options given, plasma is the fluid portion of blood, while leukocytes, platelets, and erythrocytes are cellular components suspended within it.
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