What contribution from the intrinsic and the extrinsic pathways is necessary for the common pathway to begin?

___and ____affect almost every aspect of the clotting process. (a) Calcium, vitamin K, (b) Calcium, vitamin B12,(c) Sodium, vitamin K, (d) Sodium, vitamin B12.

Multiple ChoiceMore than one choice may apply.Place the letters of these events in the order they occur during hemostasis.a. b. c. d.

What is the difference between prothrombin and thrombin?

a. Define fibrinolysis.b. What is the importance of this process?

a. How is clot overgrowth usually prevented?b. List two conditions that may lead to unnecessary (and undesirable) clot formation.

a. Define hemostasis.b. List the three major phases of coagulation. Explain what initiates each phase and what the phase accomplishes.c. In what general way do the intrinsic and extrinsic mechanisms of clotting differ?d. Which ion is essential to virtually all stages of coagulation?

Why is aspirin sometimes prescribed for the prevention of vascular problems?

A test for prothrombin time is used to identify deficiencies in the extrinsic clotting pathway; prothrombin time is prolonged if any of the factors are deficient. A test for activated partial thromboplastin time is used in a similar fashion to detect deficiencies in the intrinsic clotting pathway. Which factor would be deficient if a person had a prolonged prothrombin time but a normal partial thromboplastin time?