Multiple Choice Questions

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Squeezing of leucocytes out from the endothelium of capillaries to fight foreign agents. is known as

  • haemolysis

  • diapaedesis

  • phagocytosis

  • rouleaux


B.

diapaedesis

Leukocyte extravasation, less commonly called diapedesis, is the movement of leukocytes out of the circulatory system and towards the site of tissue damage or infection. This process forms part of the innate immune response, involving the recruitment of non-specific leukocytes.


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Assertion : Mast cells in the human body release excessive amounts of inflammatory chemicals which cause allergic reactions.

Reason : Allergens in the environment on reaching human body stimulate mast cells in certain individuals.

  • If both Assertion and Reason are true and the reason is the correct explanation of the assertion

  • If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

  • If Assertion is true statement but Reason is false

  • If both Assertion and Reason are false statements


Which of the following cytoplasmic granules contain histamine

  • Basophils

  • Acidophils

  • Eosinophils

  • Neutrophils


Refractory period of a muscle fibre in mammals is

  • 0.8001 sec

  • 0.002 sec

  • 0.004 sec

  • 0.005 sec


Which organ is considered as "Graveyard of RBC" where most of them are destroyed by macrophages

  • Red bone marrow

  • Spleen

  • Kidney

  • Intestine


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Which of the following is not immunised by triple antigen ?

  • Typhoid

  • Tetanus

  • Diptheria

  • Whooping cough


Liver damage caused by excessive drinking of alcohol is called

  • hepatitis

  • dematitis

  • liver cirrhosis

  • liver diarrhoea


The vector of the kala-azar is

  • Aedes sp

  • Anopheles stephenis

  • Culex fatigans

  • Phlebotomus sp


Which lg is produced in primary immune response

  • IgA

  • IgG

  • IgE

  • IgM


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Only one of the following four ways through which AIDS can spread?

  • Infected needles and syringes

  • Through mosquito bites

  • Looking after AIDS patient

  • Shaking hands, coughing, sneezing, hugging


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