17. The Blood

The following is a list of the phases involved in the process of hemostasis:

1. Coagulation
2. Fibrinolysis
3. Vascular spasm
4. Retraction
5. Platelet phase

The correct sequence of these phases is:

(a) 5, 1, 4, 2, 3

(b) 3, 5, 1, 4, 2

(c) 2, 3, 5, 1, 4

(d) 3, 5, 4, 1, 2

(e) 4, 3, 5, 2, 1

Which of the following statements about vascular spasms is false?

Elise is a 36-year-old woman who has volunteered to donate red bone marrow to a patient in need of a bone marrow transplant for aplastic anemia. The physician performing the bone marrow extraction is an intern, and it is her first time doing the procedure. She asks that you prepare a site on Elise's tibia for the procedure. Is this a good place for red bone marrow to be extracted, considering Elise's age? Why or why not? Can you suggest an alternative location? Explain.

Platelets are similar to erythrocytes in that both structures do not contain a _________________. Platelets are similar to leukocytes in that both their primary functions involve ________________ the body.

More than one choice may apply.

A condition resulting from thrombocytopenia is

a. Thrombus formation

b. Embolus formation

c. Petechiae

d. Hemophilia

What is the difference between prothrombin and thrombin?

Cirrhosis of the liver often reduces production of many types of plasma proteins, including albumin and clotting factors. Predict the effects on the body of decreased numbers of these proteins in the plasma. Would this also affect the number of γ-globulins in the plasma? Why or why not?

How do the intrinsic/contact activation and extrinsic/tissue factor coagulation pathways differ? How are they similar?