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InterviewSolution
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Assertion . Mast cells in human body release excessive amount of inflammatory chemicals which cause allergic reactions. Reason . Allergens in the environment on reaching human body stimulates mast cells in certain individualsA. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion and reason are falseD. If the assertion is false but reason is true |
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Answer» Correct Answer - A The symptoms of an allergic reaction develop in response to histamine. Mast cells releases a large amount of histamine into the blood stream and it also act as initiator of the inflammatory response which aids the arival of leucocytes at a site of infection. Histamine stimulates capillary dilation, increased capillary permeability, closure of bronchial tubes, mucus secretion, pain and swelling. |
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