During coagulation, which substance converts fibrinogen into insoluble fibrin strands?
Correct answer: A. Thrombin
- A. Thrombin
- B. Plasmin
- C. Albumin
- D. Erythropoietin
Explanation
Thrombin converts soluble fibrinogen into insoluble fibrin, which forms a mesh that stabilises the platelet plug. Plasmin breaks down fibrin during clot removal, while albumin and erythropoietin have different functions.
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Blood and immunity covers plasma, red blood cells, white blood cells, platelets, haemoglobin, blood groups and haemostasis. It explains innate and adaptive defenses, antibodies, lymphocytes, inflammation, vaccination and immune memory, with a distinction between active and passive immunity and between antigen and antibody.
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