Hemostasis and Cascade

Question 1

Hemostasis process (3 steps)

Answer 1

1. Vascular spasm
   2.platelet plug formation
   3.Blood clotting (coagulation)

Question 2

Blood clotting involves several clotting factors. It can be activated in 1 of 2 ways and both lead to prothrombinase

Answer 2

1. Extrinsic pathway
2. Intrinsic pathway

Question 3

Cascade steps

Answer 3

1. Clotting causes platelets to become sticky. Reduction in vasoconstriction
2. Prothrombin—>thrombin
3. Fibrinogen—-> fibrin
4. Fibrin forms mesh of fibers around platelets plug and traps blood cells, temporary clot
   4 enzyme plasmin dissolves clot

Question 4

Vitamin K is need for

Answer 4

Normal clot formation