Haemopoeisis

Question 1

what is haemopoeisis?

Answer 1

the formation of blood cells

Question 2

where are the blood cells all derived from?

Answer 2

haemopoietic stem cells which are present in the cellular component of bone marrow ( derived from mesoderm)

Question 3

what are the 3 main types of blood cell

Answer 3

red blood cell
white blood cells
platelets

Question 4

main function of red blood cell

Answer 4

carry O2

Question 5

main function of white blood cell

Answer 5

fight infection

Question 6

main function of platelets

Answer 6

prevent bleeding

Question 7

where does haemopoiesis occur in the embryo

Answer 7

yolk sac

then liver

then spleen

Question 8

where does haemopoiesis occur at birth?

Answer 8

mostly bone marrow ( liver and spleen when needed)

Question 9

where does haemopoiesis occur from birth to maturity?

Answer 9

mainly bone marrow but amount of active places starts to decrease

Question 10

where does haemopoiesis occur in adults?

Answer 10

bone marrow of:
skull
ribs
sternun
pelvis
prox femur

Question 11

life of red blood cell

Answer 11

120 days

Question 12

life of neutrophil

Answer 12

7-8 hours

Question 13

life of platelet

Answer 13

7-10 days

Question 14

immediate red cell precursor?

Answer 14

reticulocyte

Question 15

what regulates neutrophil maturation?

Answer 15

GCSF

Question 16

how would you assess haemopoeisis?

Answer 16

blood count
blood film
cell indices
bone marrow

immunophenotyping- study of antigen expression