★ Immunity Quiz
If the skin is broken then a blood clot forms to seal this cut.
What is the first step in the process of blood clotting?
A. Fibrinogen turns into fibrin
B. Platelets release clotting factors
C. Fibrinogen is converted into thrombin
D. Thrombin is converted into prothrombin
Preview next quiz:
The table shows the results of blood type tests on samples from four individuals. Which row represents an individual who can accept transfusions from people with blood type AB?
A. A
B. B
C. C
D. D
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