Which of the following statements about blood is/are correct?Question 9Select one or more:a.The main functions of blood are transportation, hemostasis and defense.b.Leukocytes are composed mostly of hemoglobin with the primary function to transport oxygen and carbon dioxide.c.The hematocrit is the percentage of blood comprised of erythrocytes.d.Blood is a connective tissue with the plasma comprising the extracellular component.e.Erythrocytes, leukocytes and platelets comprise the cellular component of blood.
Question
Which of the following statements about blood is/are correct?Question 9Select one or more:a.The main functions of blood are transportation, hemostasis and defense.b.Leukocytes are composed mostly of hemoglobin with the primary function to transport oxygen and carbon dioxide.c.The hematocrit is the percentage of blood comprised of erythrocytes.d.Blood is a connective tissue with the plasma comprising the extracellular component.e.Erythrocytes, leukocytes and platelets comprise the cellular component of blood.
Solution
The correct statements about blood are:
a. The main functions of blood are transportation, hemostasis and defense. c. The hematocrit is the percentage of blood comprised of erythrocytes. d. Blood is a connective tissue with the plasma comprising the extracellular component. e. Erythrocytes, leukocytes and platelets comprise the cellular component of blood.
Statement b is incorrect because leukocytes, also known as white blood cells, are not composed mostly of hemoglobin. Their primary function is to fight infections and they do not transport oxygen and carbon dioxide. That is the function of erythrocytes, or red blood cells.
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