Unformatted text preview: the blood that fights against foreign substances. 3. A, B, AB, O System- (Blood type) classification determined by the presence or absence of specific surface antigens in RBC cell membranes. A. Surface antigen A only. B. Surface antigen B only. AB. Both types of surface antigen. (universal recipient) O. has neither A or B antigen. (universal donor) 4. RH Factor- another protein on the surface of the red blood cell. D. Blood Clotting 1. Vascular spasm- contraction of smooth muscle cells in the blood vessel wall. 2. Platelet Plug- platelets become sticky and try to close the opening. 3. Coagulation phase- Step A. Prothrombin (inactive) is converted to Thrombin (active). Step B. Fibrinogen (inactive) is converted to Fibrin (active). Step C. Fibrinogen is converted to Fibrin by Thrombin. Fibrin forms a network that traps red blood cells....
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- Spring '11
- red blood cells, blood clotting, surface antigen