blood cell physiology Flashcards
platelets: recall the intravascular life span of platelets and summarise their origin and function
1
Q
myeloid stem cell to platelet maturation pathway
A
myeloid stem cell -> megakaryocyte -> platelet (produced by fragmentation of cytoplasm of megakaryocyte)
2
Q
how long do platelets survive in circulation
A
10 days
3
Q
function of platelets
A
role in primary haemostasis (form platelet aggregates), as contribute phospholipid which promotes blood coagulation (in coagulation cascade)
4
Q
define thrombocytosis
A
too many platelets
5
Q
define thrombocytopenia
A
too few platelets
