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Hemostasis: Blood Coagulation and Vascular Spasms

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Hemostasis: Blood Coagulation and Vascular Spasms

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Questions and Answers

What is the first step in the process of hemostasis?

Platelet plug formation (plugging the wound)

Vascular spasms (vasoconstriction at injured site) (correct)

Growth of fibrous tissue into the blood clot

Formation of a blood clot

What do activated platelets release to activate surrounding platelets and cause platelet plug formation?

Von Willebrand factor

Thromboxane A2

ADP (correct)

Fibrinogen

What mediates vasoconstriction as the first reaction to vascular damage?

Sympathetic reflex

Released chemicals by traumatized tissues and blood platelets (correct)

Growth of fibrous tissue into the blood clot

Formation of a blood clot

What glycoprotein functions as a bridge between platelet and collagen fibrils of damaged tissue?

Von Willebrand factor (C) Signup and view all the answers

What is the function of vascular spasms in the process of hemostasis?

To prevent blood loss by reducing blood flow from the site of injury (A) Signup and view all the answers

What is the role of fibrous tissue in the process of hemostasis?

To close the hole in the vessel permanently (A) Signup and view all the answers

Which substance converts prothrombin to thrombin in the extrinsic pathway?

Factor VII (D) Signup and view all the answers

What is the main function of Factor VIII in blood coagulation?

Prevention of further blood loss (C) Signup and view all the answers

What is the role of Factor XII in blood coagulation?

Activation of factors XII and XI (C) Signup and view all the answers

What is the function of Ionized Calcium (Ca++) in the formation of a blood clot?

Conversion of Fibrinogen To Fibrin (D) Signup and view all the answers

Which factor is also known as Plasma Thromboplastin Antecedent?

Factor XI (C) Signup and view all the answers

What is the composition of a blood clot?

Blood cells, platelets, and plasma (A) Signup and view all the answers

Which factor is responsible for the activation of factor VII in the extrinsic pathway?

Factor III (D) Signup and view all the answers

What is the role of Factor IX in blood coagulation?

Conversion of Fibrinogen To Fibrin (B) Signup and view all the answers

What activates factor XII in the intrinsic pathway?

Injured endothelial cells (B) Signup and view all the answers

What converts prothrombin to thrombin in the presence of enough ionic Ca++ from platelets?

Conversion of Prothrombin To Thrombin (A) Signup and view all the answers