What Will Be the Immediate Action of an Allergen When

question 23

Multiple Choice

What will be the immediate action of an allergen when it enters the body for a second time?

• A)Binding of allergen to adjacent IgE binding sites on mast cells and basophils
• B)Histamine acts on smooth muscle
• C)Prostaglandins cause vasodilation and increased vascular permeability
• D)Binding of IgE by the Fc region to mast cells and basophils
• E)Degranulation

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Definitions:

Electronegativity Difference

A measure of the difference in electronegativity between two atoms in a bond, influencing the bond's polarity.

C-H Bonds

Chemical bonds between carbon (C) and hydrogen (H) atoms, forming the backbone structure of organic molecules.

Electronegativity Difference

The difference in electronegativity values between two atoms, determining the polarity of the bond they form.

H-Se Bonds

Refers to the chemical bonds between hydrogen and selenium atoms, commonly found in hydrogen selenide.