Mekanisme Hemostasis

Which of the following statements about platelets is INCORRECT?

• Platelets adhere to collagen fibers of damaged tissue

• Platelets are cell fragments

• Platelets activate the clotting cascade

• Platelets are involved in clot dissolution

this is when platelets attach to the exposed damaged wall of the blood vessels

• Platelet adhesion

• Platelet aggregation

• Platelet plug

• degranulation

What do we call it when platelets become irregular, large and stick to each other.

• Platelet adhesion

• Platelet aggregation

• Platelet plug

• degranulation

Which substance is released by platelets that causes vasoconstriction?

• Serotonin

• Thrombin

• Fibrin

• Thromboplastin

Which of the following describes the role of factor X in blood clotting?

• to form a plug in the hole of the damaged blood vessel

• to convert prothrombin to thrombin

• to activate clotting factor V

• to release platelet factor 3

Which enzyme converts fibrinogen to fibrin?

• serotonin

• thrombin

• factor X

• factor XIII

The mesh network is formed of

• thrombin

• prothrombin

• fibrin

• fibrinogen

What is the correct order of processes involved in hemostasis?

• coagulation, vascular spasms, platelet plug forms

• platelet plug forms, vascular spasms, coagulation

• vascular spasms, coagulation, platelet plug forms

• vascular spasms, platelet plug forms, coagulation

What happens during the first step of hemostasis?

• vascular spasms constrict the flow of blood

• platelet plug forms, platelets adhere

• coagulation form fibers, scab forms

• thromus breaks away from vessel wall

What happens during the second step of hemostasis?

• vascular spasms constrict the flow of blood

• platelet plug forms, platelets adhere

• coagulation form fibers, scab forms

• thromus breaks away from vessel wall