clarification on these questions

[nsingh947]

1. which is not true?

a. erythroblasts synthesize hemoglobin

b. erythroblasts lose their nucleus and become reticulocytes that are released into the blood

c. blood cell formation must be about the same as blood cell destruction

d. erythropoietin from the kidney and liver stimulates hemopoiesis

e. all of the above are true statements

 

(i chose answer c)

 

2. which is not true about iron

a. fe2+ is more absorbable than Fe3+

b. Iron is stored in the liver by joining to apoferritin to form ferritin

c. iron is attached to each of the amino acids in hemoglobin

d. iron is transported by transferrin

e. women have a higher daily requirement for iron than men

(chose answer c)

 

which is true about erythrocyte death and disposal?

a. the globin portion of the molecule is broken down in the liver

b. the heme groups have the iron removed and are converted to bilirubin

c. macrophages in the spleen digests the plasma membrane of the erythrocyte

d. the waste molecule biliverdin is converted to bilirubin

e. the entire hemoglobin molecules are recycled back to the bone marrow for hemopoiesis

[GDG]

1. which is not true?

a. erythroblasts synthesize hemoglobin

b. erythroblasts lose their nucleus and become reticulocytes that are released into the blood

c. blood cell formation must be about the same as blood cell destruction

d. erythropoietin from the kidney and liver stimulates hemopoiesis

e. all of the above are true statements

 

(i chose answer c)

 

2. which is not true about iron

a. fe2+ is more absorbable than Fe3+

b. Iron is stored in the liver by joining to apoferritin to form ferritin

c. iron is attached to each of the amino acids in hemoglobin

d. iron is transported by transferrin

e. women have a higher daily requirement for iron than men

(chose answer c)

 

which is true about erythrocyte death and disposal?

a. the globin portion of the molecule is broken down in the liver

b. the heme groups have the iron removed and are converted to bilirubin

c. macrophages in the spleen digests the plasma membrane of the erythrocyte

d. the waste molecule biliverdin is converted to bilirubin

e. the entire hemoglobin molecules are recycled back to the bone marrow for hemopoiesis

 

In question #1, if blood cell production was greater than blood cell destruction, you would have an ever-increasing number of blood cells. Eventually, your blood vessels would be packed solid -- not good. Conversely, if production was less than destruction, you would have an ever-decreasing number -- anemia. Also not good. I think a) through d) are correct: unfortunately, you can't say that e) is not true...

 

Question #2 -- correct.

 

Question #3 -- you haven't given an answer. However, I think you'll find the answer here if you look.