All of the Following Statements About Type IV Hypersensitivities Are

question 18

Multiple Choice

All of the following statements about type IV hypersensitivities are true except

• A) The symptoms occur within a few days after exposure to an antigen.
• B) They can be passively transferred with serum.
• C) They contribute to the symptoms of certain diseases.
• D) The symptoms are due to lymphokines.
• E) They are cell mediated.

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Definitions:

First-Class Lever

A lever system where the fulcrum is situated between the effort and the load, allowing for force multiplication or change of direction.

Scissors

A tool consisting of two pivoting blades crossed at a pivot point, used for cutting paper, cloth, and other materials.

Multimotor Unit Recruitment

The physiological process where the number of active motor units within a muscle increases to enhance the strength of muscle contraction.

Wave Summation

A phenomenon in muscle physiology where successive stimuli result in stronger muscle contractions than a single stimulus.