Sometimes the Immune System Overreacts from Exposure to a Normally

question 18

Multiple Choice

Sometimes the immune system overreacts from exposure to a normally harmless substance such as cat hair. Subsequent exposure to this allergen elicits a massive inflammatory response. Because the chemical histamine is the cause of this inflammation, what cell type is most likely behind the problem?

• A) neutrophils
• B) basophils
• C) lymphocytes
• D) monocytes

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Definitions:

Sensory Adaptation

The process by which sensory receptors become less responsive to constant stimuli over time.

Absolute Threshold

The minimum intensity of stimulation that must occur before you experience a sensation.

Detection Threshold

The minimum level of intensity at which a stimulus is perceived or detected by the sensory system.

Just Noticeable Threshold

The minimum difference in stimulation that a person can detect 50% of the time; also known as the difference threshold.