Hemostasis Tests & Disorders

Question 1

Hemostasis Functions (2)

Answer 1

keep blood fluid

prevent/control blood loss

Question 2

Components of Hemostasis (5)

Answer 2

1. Vascular system
2. Platelet activity (primary hemostasis)
3. Coagulation “fibrin forming” system (secondary hemostasis)
4. Fibrinolytic “fibrin lysis” system (fibrinolysis)
5. Regulatory system

Question 3

Endothelial cells release what substances? (3)

Answer 3

1. Tissue Factor (TF)
2. Tissue Plasminogen Activator (tPA)
3. vonWillebrand’s Factor (vWF)

Question 4

Cytoplasmic fragments shed from bone marrow precursors called megakaryocytes

Answer 4

Platelets/Thrombocyte

Question 5

What are platelets regulated by? Where is the regulator made? How long do they survive?

Answer 5

1. Thrombopoeitin
2. Liver
3. 10 days