Platelets

Question 1

describe the platelets shape

Answer 1

irregular–small amount of cytoplasm surrounded by a membrane

Question 2

platelets arise from?

Answer 2

from the megakaryocyte

Question 3

what is the function of the platelets?

Answer 3

in hemostasis (blood clot)/(stop bleeding)

Question 4

what are the two cytoplasmic zones in the platelets?

Answer 4

1. hyalomere (outer zone)–cytoskeletal fibers

2. granulomere (inner zone)–organelles and vesicles

Question 5

describe the cytoskeletal fibers

Answer 5

it’s the microtubual and microfilaments

Question 6

platelets also have?

Answer 6

serotonin

Question 7

explain platelets and serotonin

Answer 7

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

Question 8

serotonin is a potent for what?

Answer 8

vassal constrictor (slows the bleeding)

Question 9

how often are platelets replaced in your body?

Answer 9

every 10 days