Serum differs from blood in________?
Correct answer: C. Lacking clotting factors
- A. Lacking globulins
- B. Lacking albumins
- C. Lacking clotting factors
- D. Lacking antibodies
Explanation
Serum is the liquid left after blood has clotted, so it lacks fibrinogen and other clotting components that were used or removed during coagulation. Students may choose lacking antibodies because serum has no cells, but antibodies remain dissolved in serum.
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