Flashcards in Platelets Deck (9)
describe the platelets shape
irregular--small amount of cytoplasm surrounded by a membrane
platelets arise from?
from the megakaryocyte
what is the function of the platelets?
in hemostasis (blood clot)/(stop bleeding)
what are the two cytoplasmic zones in the platelets?
1. hyalomere (outer zone)--cytoskeletal fibers
2. granulomere (inner zone)--organelles and vesicles
describe the cytoskeletal fibers
it's the microtubual and microfilaments
platelets also have?
explain platelets and serotonin
1. adhere to damaged wall
2. when contracting collagen within a wall the platelets will stick and swell
3. platelet plug
4. prothrombin to thrombin
5. fibrinogen to fibrin
6. clot retraction
serotonin is a potent for what?
vassal constrictor (slows the bleeding)