Question:
The blood shed during menstrual phase does NOT clot due to presence of
The blood shed during menstrual phase does NOT clot due to presence of
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Think of the enzyme that dissolves fibrin clots.
Updated On: Nov 12, 2026
- Zona lysin
- thromboplastin
- prothrombin
- fibrinolysin
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Clots are made of fibrin. An enzyme that digests fibrin will prevent a clot from staying.
Step 2: Apply to menstruation
Menstrual blood contains fibrinolysin (plasmin), which breaks fibrin down as soon as it forms, so no stable clot appears.
Step 3: Why the other options fail
Thromboplastin and prothrombin help clotting. Zona lysin is an enzyme from the sperm acrosome.
Final Answer:
Menstrual blood does not clot because of fibrinolysin. \[ \boxed{\text{(D) }\text{fibrinolysin}} \]
Clots are made of fibrin. An enzyme that digests fibrin will prevent a clot from staying.
Step 2: Apply to menstruation
Menstrual blood contains fibrinolysin (plasmin), which breaks fibrin down as soon as it forms, so no stable clot appears.
Step 3: Why the other options fail
Thromboplastin and prothrombin help clotting. Zona lysin is an enzyme from the sperm acrosome.
Final Answer:
Menstrual blood does not clot because of fibrinolysin. \[ \boxed{\text{(D) }\text{fibrinolysin}} \]
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