Immediate Hypersensitivity Reactions Result When a First Exposure to Antigen

question 52

Multiple Choice

Immediate hypersensitivity reactions result when a first exposure to antigen results in

• A) activation of IgG-producing B cells.
• B) activation of IgE-producing B cells.
• C) the activation of CTL.
• D) an elevation of eosinophils.
• E) activation of IgA-producing B cells.

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Definitions:

Diphtheria

A serious bacterial infection affecting the mucous membranes of the throat and nose, potentially causing breathing difficulties, heart failure, and paralysis.

Sleep Terrors

Episodes of screaming, intense fear, and flailing while still asleep, often paired with difficulty fully waking up.

Rapid-eye-movement Sleep

A stage of sleep characterized by movements of the eyes, low muscle tone throughout the body, and the propensity of the sleeper to dream vividly.

Nightmares

Disturbing dreams that can cause feelings of fear, terror, or anxiety, often waking the person from sleep.