Question

1. Which of the following statements are true of erythrocytes? (Read carefully and select all the correct statements.) (3 marks) a) The protein hemoglobin contains the mineral iron. b) The mineral iron enables erythrocytes to carry oxygen. c) Erythrocytes pick up oxygen in pulmonary capillaries. d) The shape of an erythrocyte is best described as a deflated soccer ball. e) Hemoglobin that has given up its oxygen is called debonded hemoglobin. f) The life span of an erythrocyte is about 60 days. 2. Which of the following statements are true of the life cycle of erythrocytes? (Read carefully and select all the correct statements.) (2 marks) a) All erythrocytes are produced in the red bone marrow and the liver. b) Vitamin B12 and folic acid are necessary for DNA synthesis in mature erythrocytes. c) Iron and protein in the diet are necessary to become part of hemoglobin. d) The intrinsic factor, produced by the liver, prevents digestion of vitamin B12. e) The only part of old erythrocytes that can be recycled is the iron. f) Old erythrocytes are phagocytized by lymphocytes in the liver, spleen, and red bone marrow. g) Bilirubin is a waste product of the heme of old hemoglobin. h) Bilirubin is normally eliminated by the kidneys. 3. Which of the following statements are true of chemical blood clotting? (Read carefully and select all the correct statements.) (4 marks) a) Many of the clotting factors are produced by the liver, but some are produced by the spleen. b) Fibrinogen is changed to fibrin in stage 1 of clotting. c) Calcium ions are needed for all three stages of clotting. d) Prothrombin activator changes thrombin to prothrombin. e) The actual clot is made of fibrin. f) The purpose of clot retraction is to create a smaller area to be repaired. g) The purpose of fibrinolysis is to strengthen a newly formed clot. h) The endothelium of blood vessels is smooth and helps prevent abnormal clotting.

          1. Which of the following statements are true of erythrocytes? (Read carefully and select all the
correct statements.) (3 marks)

a) The protein hemoglobin contains the mineral iron.
b) The mineral iron enables erythrocytes to carry oxygen.
c) Erythrocytes pick up oxygen in pulmonary capillaries.
d) The shape of an erythrocyte is best described as a deflated soccer ball.
e) Hemoglobin that has given up its oxygen is called debonded hemoglobin.
f) The life span of an erythrocyte is about 60 days.

2. Which of the following statements are true of the life cycle of erythrocytes? (Read carefully and
select all the correct statements.) (2 marks)

a) All erythrocytes are produced in the red bone marrow and the liver.
b) Vitamin B12 and folic acid are necessary for DNA synthesis in mature erythrocytes.
c) Iron and protein in the diet are necessary to become part of hemoglobin.
d) The intrinsic factor, produced by the liver, prevents digestion of vitamin B12.
e) The only part of old erythrocytes that can be recycled is the iron.
f) Old erythrocytes are phagocytized by lymphocytes in the liver, spleen, and red bone marrow.
g) Bilirubin is a waste product of the heme of old hemoglobin.
h) Bilirubin is normally eliminated by the kidneys.

3. Which of the following statements are true of chemical blood clotting? (Read carefully and select
all the correct statements.) (4 marks)

a) Many of the clotting factors are produced by the liver, but some are produced by the spleen.
b) Fibrinogen is changed to fibrin in stage 1 of clotting.
c) Calcium ions are needed for all three stages of clotting.
d) Prothrombin activator changes thrombin to prothrombin.
e) The actual clot is made of fibrin.
f) The purpose of clot retraction is to create a smaller area to be repaired.
g) The purpose of fibrinolysis is to strengthen a newly formed clot.
h) The endothelium of blood vessels is smooth and helps prevent abnormal clotting.

1. Which of the following statements are true of erythrocytes? (Read carefully and select all the
correct statements.) (3 marks)

a) The protein hemoglobin contains the mineral iron.
b) The mineral iron enables erythrocytes to carry oxygen.
c) Erythrocytes pick up oxygen in pulmonary capillaries.
d) The shape of an erythrocyte is best described as a deflated soccer ball.
e) Hemoglobin that has given up its oxygen is called debonded hemoglobin.
f) The life span of an erythrocyte is about 60 days.

2. Which of the following statements are true of the life cycle of erythrocytes? (Read carefully and
select all the correct statements.) (2 marks)

a) All erythrocytes are produced in the red bone marrow and the liver.
b) Vitamin B12 and folic acid are necessary for DNA synthesis in mature erythrocytes.
c) Iron and protein in the diet are necessary to become part of hemoglobin.
d) The intrinsic factor, produced by the liver, prevents digestion of vitamin B12.
e) The only part of old erythrocytes that can be recycled is the iron.
f) Old erythrocytes are phagocytized by lymphocytes in the liver, spleen, and red bone marrow.
g) Bilirubin is a waste product of the heme of old hemoglobin.
h) Bilirubin is normally eliminated by the kidneys.

3. Which of the following statements are true of chemical blood clotting? (Read carefully and select
all the correct statements.) (4 marks)

a) Many of the clotting factors are produced by the liver, but some are produced by the spleen.
b) Fibrinogen is changed to fibrin in stage 1 of clotting.
c) Calcium ions are needed for all three stages of clotting.
d) Prothrombin activator changes thrombin to prothrombin.
e) The actual clot is made of fibrin.
f) The purpose of clot retraction is to create a smaller area to be repaired.
g) The purpose of fibrinolysis is to strengthen a newly formed clot.
h) The endothelium of blood vessels is smooth and helps prevent abnormal clotting.

Added by Nicol-S B.

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