The Quick Response of the Immune System to a Second

question 12

Multiple Choice

The quick response of the immune system to a second infection is due to

• A) activation of macrophage cells.
• B) suppression of suppressor cells.
• C) T and B memory cells.
• D) high levels of antigen.
• E) new cytotoxic T cells.

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Definitions:

Variable Expenses

Costs that vary directly and proportionally with the level of output or sales volume.

Increased Advertising

A strategy involving the amplification of efforts in promoting products or services to boost brand visibility and sales.

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Margin of Safety Percentage

The ratio that indicates how much sales can decline before a business reaches its break-even point.