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Multiple Choice
Which plasma component is absent from serum?
A
Fibrinogen
B
Albumin
C
Globulins
D
Electrolytes
Verified step by step guidance
1
Understand the difference between plasma and serum: Plasma is the liquid component of blood that contains water, electrolytes, proteins, and other substances. Serum is the fluid that remains after blood has clotted and the clotting factors have been removed.
Identify the key components of plasma: Plasma contains water, electrolytes, proteins (such as albumin, globulins, and fibrinogen), nutrients, hormones, and waste products.
Recognize the process of blood clotting: When blood clots, fibrinogen is converted into fibrin, which forms a mesh that helps in clot formation. This process removes fibrinogen from the liquid component, resulting in serum.
Determine which component is removed during clotting: Since fibrinogen is used up in the clotting process to form fibrin, it is absent from serum.
Conclude that fibrinogen is the plasma component absent from serum, as it is involved in the clotting process and is not present in the liquid portion after clotting has occurred.