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In a typical healthy adult, approximately how many gallons of blood are in the human body?
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17. The Blood
Introduction To Blood
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In the context of blood composition, blood plasma minus fibrinogen and other clotting factors is called which of the following?
A
Formed elements
B
Platelet-rich plasma
C
Serum
D
Hematocrit
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Step 1: Understand the components of blood. Blood is composed of plasma and formed elements. Plasma is the liquid portion containing water, proteins, nutrients, hormones, and waste products.
Step 2: Recognize that plasma contains clotting factors such as fibrinogen, which are essential for blood clotting.
Step 3: When blood clots, fibrinogen and other clotting factors are used up to form the clot, and the remaining fluid portion is called serum.
Step 4: Differentiate serum from plasma: serum is plasma without fibrinogen and clotting factors, whereas plasma still contains these proteins.
Step 5: Review the answer choices and identify that 'Serum' correctly describes blood plasma minus fibrinogen and other clotting factors.
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