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Assertion . Histamine is involved in all...

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

A

If both the assertion and reason are true and reason is correct explanation of the assertion .

B

If both the assertion and reason are true but reason 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.

Text Solution

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The correct Answer is:
A
Histamine is derivativve of the aminoacid histidine produced by damaged cells of vertbrates . When released, it has the effect of dialating capillaries and lowering blood pressure . Histamine is involved in allergic and inflammatory reactions.
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