21) In the process of hemoglobin recycling, each heme molecule : 1200302

21) In the process of hemoglobin recycling, each heme molecule : 1200302.

 

21) In the process of hemoglobin recycling, each heme molecule is stripped of its iron and converted to which pigmented organic compound?

A) urobilin

B) bilirubin

C) stercobilin

D) transferrin

E) biliverdin

22) EPO is released when

A) oxygen levels in the blood increase.

B) oxygen levels in the blood decrease.

C) carbon dioxide levels in the blood increase.

D) carbon dioxide levels in the blood decrease.

E) protein levels in the blood increase.

23) Playing a critical role in RBC formation, a woman’s iron reserve is ________ percent of a typical man’s iron reserve.

A) 85

B) 60

C) 50

D) 35

E) 10

24) After 24 hours in circulation, the ________ complete their maturation and become indistinguishable from other mature RBCs.

A) reticulocytes

B) myelocytes

C) erythroblasts

D) hemocytoblasts

E) monocytes

25) Which disease is characterized by defective hemoglobin that results from a mutation affecting the amino acid sequence of one pair of the globular proteins of the hemoglobin molecule resulting in stiff, markedly curved red blood cells?

A) sickle cell anemia

B) thalassemia

C) hematuria

D) jaundice

E) aplastic anemia

26) Which condition results from abnormally high levels of bilirubin in the plasma of blood?

A) hematuria

B) hypoxia

C) hemoglobinuria

D) jaundice

E) thalassemia

27) For erythropoiesis to proceed normally, protein synthesis requires adequate supplies of factors, such as vitamin B12, which is absorbed from the diet in the presence of which of the following?

A) thyroxine

B) intrinsic factor

C) Factor X

D) platelet factor

E) EPO

28) During red blood cell development, what is the term given to the first anucleate cell?

A) reticulocyte

B) erythrocyte

C) myeloid stem cell

D) hemocytoblast

E) proerythroblast

29) A hemoglobin molecule contains

A) three protein chains, four heme groups, and two iron ions.

B) two protein chains, two heme groups, and four iron ions.

C) four protein chains, two heme groups, and two iron ions.

D) four protein chains, four heme groups, and four iron ions.

E) four protein chains, six heme groups, and two iron ions.

30) During the recycling of hemoglobin, what is the breakdown product of the globular proteins of each hemoglobin molecule?

A) amino acids

B) stercobilins

C) bilirubin

D) transferrin

E) urobilins

 

 

21) In the process of hemoglobin recycling, each heme molecule : 1200302

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