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MCAT Question A Day - 4/22/14

The inflammatory response results from the release of histamine by mast cells or basophils. The redness, heat, pain, and swelling associated with inflammation are due to which physiological effects of histamine?

A.  Dilation of local blood vessels / less fluid leakage from capillaries
B.  Dilation of local blood vessels / more fluid leakage from capillaries
C.  Constriction of local blood vessels / less fluid leakage from capillaries
D.  Constriction of local blood vessels / more fluid leakage from capillaries

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