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Histology Part 2 > Platelets > Flashcards

Flashcards in Platelets Deck (9)
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1
Q

describe the platelets shape

A

irregular–small amount of cytoplasm surrounded by a membrane

2
Q

platelets arise from?

A

from the megakaryocyte

3
Q

what is the function of the platelets?

A

in hemostasis (blood clot)/(stop bleeding)

4
Q

what are the two cytoplasmic zones in the platelets?

A
  1. hyalomere (outer zone)–cytoskeletal fibers

2. granulomere (inner zone)–organelles and vesicles

5
Q

describe the cytoskeletal fibers

A

it’s the microtubual and microfilaments

6
Q

platelets also have?

A

serotonin

7
Q

explain platelets and serotonin

A
  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
Q

serotonin is a potent for what?

A

vassal constrictor (slows the bleeding)

9
Q

how often are platelets replaced in your body?

A

every 10 days