Haematopoeisis Flashcards
Haemopoiesis definition
production of red cells, platelets and white cells
erythropoiesis definition
red cell production
thrombopoiesis definition
platelet production
myelopoiesis/granulopoeisis definition
granulocyte production
lymphopoeisis definition
lymphocyte production
red cell lifespan
120 days
What is most frequent blood cell
red cells
neutrophils lifespan
7-8hrs
platelets lifespan
7-10days
What is a “blast” e.g. erythroblast or myeloblast?
nucleated precursor cell
What are megakaryocytes?
platelet precursor cells - they are polypoid because have lots of chromosomes because cells don’t divide
What are myelocytes?
nucleated precursor between neutrophils and blasts
Stem cells have a property of self-renewal but this is lost in descendants. T/F?
True
Stem cells are generally dormant during steady-state haemopoiesis. T/F?
True
Myeloid definition (s)
can be marrow,
can be lineage e.g. the non-lymphoid,
can be granulocytes precursors or precursors e.g. myeloid:erythroid ratio