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Questions and Answers
What is the normal hematocrit percentage in men?
What is the normal hematocrit percentage in men?
- 45 percent (correct)
- 47 percent
- 40 percent
- 42 percent
How is the hematocrit measured?
How is the hematocrit measured?
- By analyzing the color of erythrocytes
- By counting the number of leukocytes
- By centrifuging a blood sample (correct)
- By measuring the amount of iron in the blood
What is the volume of plasma in an average-sized person with a 45 percent hematocrit?
What is the volume of plasma in an average-sized person with a 45 percent hematocrit?
- 3.0 L (correct)
- 4.0 L
- 3.5 L
- 2.5 L
What is the quantity of hemoglobin that red blood cells can concentrate in their cell fluid?
What is the quantity of hemoglobin that red blood cells can concentrate in their cell fluid?
Why is it important to understand the means by which iron is utilized in the body?
Why is it important to understand the means by which iron is utilized in the body?
What is the approximate volume of blood in an average-sized person (70 kg)?
What is the approximate volume of blood in an average-sized person (70 kg)?
What is the primary function of hemoglobin in the body?
What is the primary function of hemoglobin in the body?
What determines the binding affinity of the hemoglobin for oxygen?
What determines the binding affinity of the hemoglobin for oxygen?
What happens when reticulocytes leave the bone marrow and pass into the blood stream?
What happens when reticulocytes leave the bone marrow and pass into the blood stream?
What alteration in the hemoglobin molecule leads to sickle cell anemia?
What alteration in the hemoglobin molecule leads to sickle cell anemia?
Where is excess iron deposited in the body?
Where is excess iron deposited in the body?
What is the role of transferrin in iron metabolism?
What is the role of transferrin in iron metabolism?
What happens to old abnormal red cells when the spleen is removed?
What happens to old abnormal red cells when the spleen is removed?
What happens when red blood cells burst and release their hemoglobin?
What happens when red blood cells burst and release their hemoglobin?
What is unique about transferrin's interaction with erythroblasts?
What is unique about transferrin's interaction with erythroblasts?
What is stored as hemosiderin?
What is stored as hemosiderin?
What causes severe hypochromic anemia?
What causes severe hypochromic anemia?
Where does most destruction of red blood cells occur?
Where does most destruction of red blood cells occur?
Which of the following is the primary role of transferrin in the process described?
Which of the following is the primary role of transferrin in the process described?
In cases of chronic blood loss, why are RBCs smaller than normal and contain too little hemoglobin?
In cases of chronic blood loss, why are RBCs smaller than normal and contain too little hemoglobin?
What condition may lead to megaloblastic anemia due to slow reproduction of erythroblasts in the bone marrow?
What condition may lead to megaloblastic anemia due to slow reproduction of erythroblasts in the bone marrow?
What is the basic abnormality in pernicious anemia?
What is the basic abnormality in pernicious anemia?
What is the role of intrinsic factor in the absorption of vitamin B12 from the gastrointestinal tract?
What is the role of intrinsic factor in the absorption of vitamin B12 from the gastrointestinal tract?
What is the minimum amount of vitamin B12 required each day to maintain normal red cell maturation?
What is the minimum amount of vitamin B12 required each day to maintain normal red cell maturation?
What is a common cause of maturation failure anemia?
What is a common cause of maturation failure anemia?
What leads to hemolytic anemia?
What leads to hemolytic anemia?
What characterizes RBCs in hereditary spherocytosis?
What characterizes RBCs in hereditary spherocytosis?
What causes the cells in sickle cell disease to become highly fragile?
What causes the cells in sickle cell disease to become highly fragile?
What event in erythroblastosis fetalis leads to rapid rupture of Rh-positive RBCs in the fetus?
What event in erythroblastosis fetalis leads to rapid rupture of Rh-positive RBCs in the fetus?
What causes the bloodforming organs to produce large quantities of extra RBCs in secondary polycythemia?
What causes the bloodforming organs to produce large quantities of extra RBCs in secondary polycythemia?
What is the characteristic of physiological polycythemia in individuals living at high altitudes?
What is the characteristic of physiological polycythemia in individuals living at high altitudes?
What distinguishes polycythemia vera from physiological polycythemia?
What distinguishes polycythemia vera from physiological polycythemia?
What is the cause of excess production of RBCs in polycythemia vera?
What is the cause of excess production of RBCs in polycythemia vera?
What is the hematocrit percentage in polycythemia vera compared to the normal range?
What is the hematocrit percentage in polycythemia vera compared to the normal range?
What effect does polycythemia vera have on the total blood volume?
What effect does polycythemia vera have on the total blood volume?
What is a consequence of the entire vascular system becoming intensely engorged in polycythemia vera?
What is a consequence of the entire vascular system becoming intensely engorged in polycythemia vera?
What condition causes a large number of early blast forms of RBCs to be released from the bone marrow into the blood?
What condition causes a large number of early blast forms of RBCs to be released from the bone marrow into the blood?
What type of secondary polycythemia occurs in those living at altitudes of 14,000 to 17,000 feet?
What type of secondary polycythemia occurs in those living at altitudes of 14,000 to 17,000 feet?
What causes sickling, ruptured RBCs, and further decrease in oxygen tension in sickle cell disease crisis?
What causes sickling, ruptured RBCs, and further decrease in oxygen tension in sickle cell disease crisis?
