Phil Stands at Rest with Both Feet on a Scale

question 126

Multiple Choice

Phil stands at rest with both feet on a scale that reads 500 N.After he gently lifts one foot,the scale reads

• A)less than 500 N.
• B)500 N.
• C)more than 500 N.

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Definitions:

Spleen

An organ involved in the production and removal of blood cells and part of the immune system.

Innate Immunity

A part of the immune system that provides immediate defense against infection but does not confer long-lasting or protective immunity to the host.

Adaptive Immunity

The component of the immune system that is characterized by memory and specificity, allowing for an enhanced response to subsequent encounters with antigens.

Memory Cells

Specific cells in the immune system that remember an antigen that the body has previously encountered, allowing a faster and stronger response upon re-exposure.