What Will Be the Immediate Action of an Allergen When

question 37

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

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Definitions:

Sympathetic Nervous

This term is incomplete. However, it might refer to the "Sympathetic Nervous System," which is part of the autonomic nervous system responsible for the body's 'fight or flight' response.

Somatic Nervous

Part of the peripheral nervous system that controls voluntary movements of the body through control of skeletal muscles.

Parasympathetic Nervous

Part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract.

Endocrine

Pertaining to the system of glands that release hormones directly into the bloodstream to regulate processes such as growth, metabolism, and mood.