Q178 / 180 · AIIMS 2002 · Zoology

Assertion : Histamine is involved in allergic and inflammatory reactions. Reason : Histamine is a vasodilator.

  • A
    If both the assertion and reason are true and reason is a correct explanation of the assertion.
  • Correct answer
    B
    If both assertion and reason are true but assertion is not a correct explanation of the assertion.
  • C
    If the assertion is true but the reason is false.
  • D
    If both assertion and reason are false.

Solution

Histamine is a derivative of the amino acid histidine produced by damaged cells of vertebrates. When released, it has the effect of dilating capillaries and lowering blood pressure. Histamine is involved in allergic and inflammatory reactions.

Hence, the correct answer is option: 'B'.

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