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Histology Part 2 > Platelets > Flashcards

Flashcards in Platelets Deck (9)
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1

describe the platelets shape

irregular--small amount of cytoplasm surrounded by a membrane

2

platelets arise from?

from the megakaryocyte

3

what is the function of the platelets?

in hemostasis (blood clot)/(stop bleeding)

4

what are the two cytoplasmic zones in the platelets?

1. hyalomere (outer zone)--cytoskeletal fibers
2. granulomere (inner zone)--organelles and vesicles

5

describe the cytoskeletal fibers

it's the microtubual and microfilaments

6

platelets also have?

serotonin

7

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

8

serotonin is a potent for what?

vassal constrictor (slows the bleeding)

9

how often are platelets replaced in your body?

every 10 days