PLAQUETAS QUIZ 2
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Health Sciences
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University
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Practice Problem
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
1. Las plaquetas se originan a partir de:
a) Eritroblastos
b) Megacariocitos
c) Monocitos
d) Células endoteliales
Answer explanation
→ Se forman por fragmentación del citoplasma (med.osea)
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
2. La vida media aproximada de las plaquetas en sangre es:
a) 3 días
b) 7 días
c) 10 días
d) 14 días
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
3. El factor de Von Willebrand cumple una función esencial en:
a) Activación plaquetaria
b) Adhesión plaquetaria
c) Retracción del coágulo
d) Formación de trombina.
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
4. ¿Qué integrina plaquetaria es fundamental para la agregación plaquetaria?
a) GP Ib
b) GP IIb/IIIa
c) GP IX
d) GP V
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
5. En una hemorragia aguda se puede encontrar:
a) Trombocitopenia
b) Trombocitosis
c) Pancitopenia
d) Trombocitopatía
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
6. La contracción plaquetaria se produce gracias a la interacción de:
a) Actina y troponina
b) Actina y miosina
c) Miosina y colágeno
d) Fibrina y tropomiosina
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
7. Sustancia que promueve la vasoconstricción durante la hemostasia:
a) Serotonina
b) Heparina
c) Prostaciclina
d) Fibrinógeno
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