Hemopoesis

Question 1

Erythropoesis

Answer 1

Reticulocyte nucleus shrinks and disappears

and retain enough metabolic activity to maintain membrane, hemoglobin, anabolic metabolism

Question 2

what is needed to produce RBCs

Answer 2

membrane, hemoglobin, anabolic metabolism

Question 3

How long does erythropoiesis take?

Answer 3

about 8 days

Question 4

what is required for RBC to form

Answer 4

iron, B12, folic acid

Question 5

normal number of RBC

Answer 5

5x10^2/ liter

Question 6

Leukopoesis

Answer 6

lymphocyte progenitors migrate to the tissues to mature

Question 7

circulating granulocytes are

Answer 7

mature and ready to act

Question 8

circulating monocytes are

Answer 8

immature and develop into macrophages

numbers vary based on the type of growth factor that is released

Question 9

Thrombopoiesis

Answer 9

Derived from megokaryocyte in the bone marrow and produced by fragmentation not mitosis

Question 10

Formation of a megakaryocyte

Answer 10

cytoplasm develops a vesicle
membrane becomes discontinuous
Sheds cytoplasmic fragments into blood through sinusoids of bone marrow

Question 11

noral platelet conts

Answer 11

250x10^9 
average life span- 3 days 
spleen holds 1/3 of total reserve
controlled by: hormone thrombopoietin 
growth factor