Unit 9: Blood Test

Front

What triggers a vascular spasm?

Back

Direct injury to a blood vessel.

Front

__ is described as stoppage of bleeding.

Back

Hemostasis

Front

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

Back

Platelets are involved in clot dissolution

Front

What component of blood is involved in clotting?

Back

platelets

Front

The mesh network is formed of

Back

fibrin

Front

Vasoconstriction

Back

blood vessels constrict (or “shrink”) to slow blood flow at the site of injury

Front

The purpose of this step of hemostasis is to decrease blood loss for 20-30 minutes.

Back

Vascular Spasm

Front

During this step, Von Willebrand factor binds platelets to the exposed collagen fibers, making nearby platelets sticky.

Back

Platelet Plug Formation

Front

During this step, fibrin forms a mesh that traps erythrocytes and platelets, which form a clot.

Back

Coagulation

Front

What is the role of fibrin in blood clotting?

Back

forms a mesh of fibres to cover the wound