An Antihistamine Counters the Effects of Histamine

An antihistamine counters the effects of histamine. Which of the following is an effect of histamine?

A) Increased blood flow brings more white blood cells to the site of injury or invasion.
B) Capillary dilation increases blood flow and causes surface redness.
C) Increased blood flow and permeability increase the fluids in the tissues, causing them to swell.
D) Increased blood flow brings more warmth to the area, causing a local "fever" that helps white blood cells and suppresses microbes.
E) All of the answer choices are effects of histamine.

Correct Answer:

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