Which white blood cells comprise 20% to 30% of the circulating WBCs and are the cells that function in the body’s specific immune system?
A. Eosinophils
B. Monocytes
C. Basophils
D. Lymphocytes
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What will be the immediate action of an allergen when it enters the body for a second time?
A. Binding of IgE by the Fc region to mast cells and basophils
B. Degranulation
C. Binding of allergen to adjacent IgE binding sites on mast cells and basophils
D. Prostaglandins cause vasodilation and increased vascular permeability
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