NEET Biology NEET PYQ-Circulation In Animals Body Fluids

  • question_answer
    In mammals, histamine is secreted by: [AIPMT 1998]

    A) fibroblasts

    B) histocytes

    C) lymphocytes

    D) mast cells

    Correct Answer: D

    Solution :

    [D] 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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