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Thrombocyte Release and Hemostasis Process Quiz

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Thrombocyte Release and Hemostasis Process Quiz

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Questions and Answers

What time frame is considered normal for bleeding time?

5-7 minutes

3-5 minutes

7-10 minutes

1-3 minutes (correct)

Which neurotransmitter is involved in inducing blood vessel contraction or convulsion?

Fibrinogen

5-hydroxytryptamine (5-HT) (correct)

Thrombin sensitive protein

Adenosine diphosphate (ADP)

What process can turn a loose platelet thrombus into a compact platelet thrombus?

ATP release and ATPase activation

Ca2+ release and cytoskeleton movement (correct)

ADP binding to platelet receptors

Fibrinogen aggregation on platelet surface

What is the role of activated platelets in hemostasis?

Supply lecithoid surface for blood clotting factor and involve in activating factor X and prothrombin Signup and view all the answers

What is the first step in the process of hemostasis?

Vascular spasm Signup and view all the answers

What is the shape of an activated platelet for hemostasis?

Biconvex Signup and view all the answers

Which physiological factor induces thrombocyte aggregation in hemostasis?

Thrombin Signup and view all the answers

What is the average cubage of a platelet?

$8 µm^3$ Signup and view all the answers

What is the normal concentration of platelets in the blood?

150,000 - 400,000 per μL Signup and view all the answers

Which organelle is responsible for amplifying reaction to injury in platelets?

Alpha granules Signup and view all the answers

What is the composition of the peripheral zone of platelets?

Site of platelet adhesion and aggregation Signup and view all the answers

Which receptor in the peripheral zone of platelets serves as the receptor for vWF?

Gp1b Signup and view all the answers

What is the function of the sol-gel zone in platelets?

For contraction and support Signup and view all the answers

Where does thrombopoiesis occur?

Bone marrow Signup and view all the answers

What is the role of the fibrinogen group in blood coagulation?

Completely consumed during coagulation Signup and view all the answers

Which group of coagulation factors is not consumed during coagulation?

Contact group Signup and view all the answers

What characterizes the primary platelet plug in secondary hemostasis?

Unstable and easily dislodged Signup and view all the answers

Which of the following is NOT a characteristic of blood clotting enzymes?

All are synthesized by the liver with VitK Signup and view all the answers