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Assertion (A) : Blood coagulates in uninjured blood vessels.
Reason (R) : Uninjured blood vessels release an anticoagulant heparin.
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  • c)
    If Assertion is true but Reason is false.
  • d)
    If both Assertion and Reason are false.
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Assertion (A) : Blood coagulates in uninjured blood vessels.Reason (R)...
When an injury is caused to a blood vessel, bleeding starts which is stopped by blood clotting. At the site of injury blood platelets release platelet factor - 3 and injured tissues release thromboplastin. The two combine to form prothrombinase enzyme which converts prothrombin to thrombin. The latter stimulates formation of fibrin thread or clot. Blood contains an anticoagutant heparin which prevents blood clotting in uninjured vessels.
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Assertion (A) : Blood coagulates in uninjured blood vessels.Reason (R) : Uninjured blood vessels release an anticoagulant heparin.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertion.b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is false.d)If both Assertion and Reason are false.Correct answer is option 'D'. Can you explain this answer?
Question Description
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