Which of the following statements regarding leukocytes is TRUE?
A. Leukocytes have no nucleus.
B. Leukocytes play a role in oxygen transport.
C. Leukocytes are the largest of the formed elements.
D. Leukocytes are only fragments of cells.
E. There is only one kind of leukocyte.
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Question 2) Erythropoietin
A. is a product of the kidney.
B. inhibits the production of erythrocytes.
C. is produced in response to increased blood pressure.
D. is found both in the plasma and inside red blood cells.
E. is produced by the red bone marrow.
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Question 3) Randolf was suffering from severe hepatitis. His skin appeared to be jaundiced. That color change was due to
A. increased heme in his circulatory system.
B. increased globin in his circulatory system.
C. increased bilirubin in his circulatory system.
D. decreased rate of globin breakdown.
E. increased globin in his circulatory system, increased bilirubin in his circulatory system and decreased rate of globin breakdown.
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Question 4) Bilirubin
A. is found in white blood cells.
B. may be reused in erythropoiesis.
C. is formed from the globin groups of hemoglobin.
D. is made from bile.
E. may build up in the circulation and cause jaundice.
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Question 5) Which of the following formed elements do not have chromosomes?
A. erythrocytes
B. reticulocytes
C. erythroblasts
D. erythrocytes and reticulocytes
E. erythrocytes, reticulocytes and erythroblasts
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Question 6) When erythrocytes are destroyed, which of the following events occurs?
A. Urine output increases.
B. Iron is secreted into the bile.
C. Heme is transported by transferrin to the liver.
D. The globin portion of the molecule is broken down into amino acids.
E. Bile is manufactured by the gall bladder.
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Question 7) When defective erythrocytes are broken down,
A. they are removed from the blood by the lungs.
B. bilirubin is formed from the breakdown of hemoglobin.
C. their heme groups are converted into amino acids.
D. their iron is excreted into the small intestine.
E. their components cannot be recycled.
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Question 8) Mr. Smith moved from a low altitude to a high altitude and experienced an increase in RBCs. Which of the following caused this increase?
A. the lower temperature present at higher altitudes
B. the lower oxygen concentration seen at higher altitudes
C. the increased metabolic rate seen at higher altitudes
D. the increased CO2 retention that occurs at high altitudes
E. He exercised more.
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Question 9) The oxygenated form of hemoglobin is called
A. oxyhemoglobin.
B. deoxyhemoglobin.
C. carboxyhemoglobin.
D. carbaminohemoglobin.
E. loaded hemoglobin.
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Question 10) Which of the following would lead to increased erythropoiesis?
A. increased environmental O2 levels
B. increased erythropoietin levels
C. increased blood pH
D. increased blood pressure
E. increased CO2 levels
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