Chapter 22 Disorders of Hemostasis

Question 1

What is hemostasis? What are the two main categories of hemostasis dysfunction?

Answer 1

Stoppage of blood flow. Inappropriate formation of clots within the vascular system (thrombosis). Failure of blood to clot despite appropriate stimuli.

Question 2

What are the four steps in achieving hemostasis?

Answer 2

1. Vascular spasm
2. Formation of temporary plug “platelet plug”
3. Activation of coagulation cascade
4. Formation of fibrin plug