NEET AIPMT SOLVED PAPER 1998

  • question_answer
                In mammals, histamine is secreted by:                                                                                                      

    A)              fibroblasts             

    B)              histocytes                             

    C)              lymphocytes        

    D)              mast cells

    Correct Answer: D

    Solution :

    Histamine is a potent vasodilator formed by decarboxylation of the amino acid histidine and released by mast cells in response to appropriate antigens.                 Mast cells are especially prevalent in the connective tissue of the skin and respiratory tract and in surrounding blood vessels.


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