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:

Emotional Event

An occurrence or situation that triggers a strong emotional response, such as joy, sadness, fear, or anger.

Vivid

Producing powerful feelings or strong, clear images in the mind; marked by intense color, brightness, or clarity.

Long-term Potentiation

A long-lasting increase in signal transmission between two neurons that results from their simultaneous activation.

Biological Mechanism

The processes and systems within living organisms that lead to observable phenomena.