Given below are two statements: Statement I: The coagulum is formed of a network of threads called thrombins. Statement II: Spleen is the graveyard of erythrocytes. In the light of the above statements, choose the most appropriate answer from the options given below :
Answer: (D) Statement I is incorrect but Statement II is correct. Answer: (d) Statement I is incorrect but Statement II is correct Solution: Statement I is wrong because the coagulum (clot) is a network of threads called fibrins, not thrombins — thrombin is only the enzyme that converts fibrinogen to fibrin.
- A.Both Statement I and Statement II are correct
- B.Both Statement I and Statement II are incorrect
- C.Statement I is correct but Statement II is incorrect
- D.Statement I is incorrect but Statement II is correct✓
Correct Answer
(D) Statement I is incorrect but Statement II is correct
Solution & Explanation
Answer: (d) Statement I is incorrect but Statement II is correct Solution: Statement I is wrong because the coagulum (clot) is a network of threads called fibrins, not thrombins — thrombin is only the enzyme that converts fibrinogen to fibrin. Statement II is correct: RBCs are destroyed in the spleen after their ~120-day lifespan, so the spleen is the graveyard of erythrocytes. Hence I incorrect, II correct. NCERT: Ch 15, p.196, line 41 — "called fibrins in which dead and damaged formed elements of blood are trapped"