Multiple Choice
In human blood, what is the name of the liquid portion that suspends the formed elements (cells and platelets)?
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17. The Blood
Introduction To Blood
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In the context of blood composition, the liquid portion of blood is called the:
A
Hemoglobin
B
Formed elements
C
Serum
D
Plasma
Verified step by step guidance1
Step 1: Understand the components of blood. Blood is composed of two main parts: the liquid portion and the cellular portion.
Step 2: Identify the cellular portion, which includes formed elements such as red blood cells, white blood cells, and platelets.
Step 3: Recognize that hemoglobin is a protein found inside red blood cells, responsible for oxygen transport, not a component of the liquid portion.
Step 4: Differentiate between plasma and serum. Plasma is the liquid portion of blood that contains water, proteins, nutrients, hormones, and waste products, including clotting factors.
Step 5: Note that serum is plasma without the clotting factors, so the correct term for the liquid portion of blood before clotting is plasma.
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