Home
Class 12
BIOLOGY
Assertion: Platelets play an important r...

Assertion: Platelets play an important role in blood clotting.
Reason: In the blood oozing from an injury, the platelets disintegrate and release thromboplasm that initiates clotting.

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion .

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
3
Promotional Banner

Topper's Solved these Questions

  • HUMAN PHYSIOLOGY -I

    ALLEN|Exercise BEGINNERS BOX-3|10 Videos
  • HUMAN PHYSIOLOGY -I

    ALLEN|Exercise BEGINNERS BOX-4|12 Videos
  • HUMAN PHYSIOLOGY -I

    ALLEN|Exercise Exercise -III (NCERT BASED QUESTIONS)|63 Videos
  • HUMAN HEALTH AND DISEASE

    ALLEN|Exercise Question|116 Videos
  • HUMAN REPRODUCTION

    ALLEN|Exercise Question|92 Videos

Similar Questions

Explore conceptually related problems

Which of the following ions play important role in blood clotting?

[A] : Blood platelets play a very important role in coagulation of blood. [R]: When blood is shed, the platelets disin- tegrate and liberate thromboplastin which activates prothrombin into thrombin.

What is the role of thrombin in blood clotting ?

Blood platelets release

Platelets help in clotting of blood.

Name the proteins present in the blood that play important part in clotting of blood.

Which substance initiate clotting of blood ?

Assertion: DNA ligase plays an important role in recombinant DNA technology. Reason: The linking of antibiotic resistance gene with plasmid vector became possible by enzyme DNA ligase

Assertion: Blood does not coagulate in unijured blood vessels. Reason: Uninjured blood vessels release an anticoagulant heparin.

Assertion : Ca^(2+) plays important role in the muscle contraction. Reason : Ca^(2+) Combines with troponin chain, displacing tropomyosin allowing the myosin head part to combine with actin to from actomyosin complex .

ALLEN-HUMAN PHYSIOLOGY -I-EXERCISE-IV(Assertion & Reason)
  1. Assertion : Smoking makes oxgyen less available to the body Reason :...

    Text Solution

    |

  2. Assertion : Lymphocyte are the largest corpuscles. Reason : Nucleu...

    Text Solution

    |

  3. Assertion: Platelets play an important role in blood clotting. Reaso...

    Text Solution

    |

  4. Assertion :- Blood group 'O' is a univesal donar blood. Reason :- A...

    Text Solution

    |

  5. Assertion :- Rh factor is considered in blood transfusion. Reason :...

    Text Solution

    |

  6. Assertion: Heparin is an anticoagulant found in mammals. Reason: He...

    Text Solution

    |

  7. Assertion : Deficiency of vitamin B(12) and folic acid can cause anaem...

    Text Solution

    |

  8. Assertion : Most of the human haemoglobin in our body has 2 alph and 2...

    Text Solution

    |

  9. Assertion :- Prothrombinase enzymes converts prothrombin into active t...

    Text Solution

    |

  10. Assertion : Though AV node generates impulses, it is still not called ...

    Text Solution

    |

  11. Assertion : Portal system consists of veins which start from capillari...

    Text Solution

    |

  12. Assertion : Systolic pressure is higher then diastolic pressure. Rea...

    Text Solution

    |

  13. Assertion : Generally old people have hiher blood pressure. Reason :...

    Text Solution

    |

  14. Assertion : If the muscles of both auricles of the person permanently ...

    Text Solution

    |

  15. Assertion : If all external nerve supplies to a human heart are cut th...

    Text Solution

    |

  16. Assertion : Lymph is the filtered blood from capillaries, which is ric...

    Text Solution

    |

  17. Assertion : In joint diastole, all the four chamber of heart are in r...

    Text Solution

    |

  18. Assertion : The pause between the end of the second sound and the beg...

    Text Solution

    |

  19. Assertion : LUBB (First Sound) is of shorter duration and sharp sound...

    Text Solution

    |

  20. Assertion : Portal system consists of veins which start from capillari...

    Text Solution

    |