Multiple Choice
Which of the following best describes the role of the blood-brain barrier?
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17. The Blood
Introduction To Blood
Multiple Choice
Which of the following is not one of the formed elements of blood?
A
Platelets
B
Leukocytes
C
Erythrocytes
D
Plasma
Verified step by step guidance1
Understand the components of blood: Blood is composed of formed elements and plasma. Formed elements include cells and cell fragments, while plasma is the liquid portion.
Identify the formed elements of blood: The formed elements include erythrocytes (red blood cells), leukocytes (white blood cells), and platelets (thrombocytes).
Recognize the role of plasma: Plasma is the liquid component of blood that carries cells and other substances throughout the body. It is not considered a formed element.
Compare the options given: Platelets, leukocytes, and erythrocytes are all formed elements, while plasma is not.
Conclude which option is not a formed element: Based on the understanding that plasma is the liquid part of blood, it is not one of the formed elements.
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