Which One of the Following Statements About T Cells Involved

question 14

Multiple Choice

Which one of the following statements about T cells involved in an immune response is NOT true?

• A)Activated T cells receive survival signals from antigen during an infection.
• B)Activated T cells contribute to the activation of antigen-presenting cells via CD40 ligand.
• C)Memory T cells generated during a primary immune response express high levels of interleukin-2 receptors and actively proliferate long after the primary response is completed.
• D)The major effector function of helper T cells is to activate macrophages and other cells by releasing cytokines.
• E)When an infection is eliminated,activated T cells die by apoptosis.

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Definitions:

Scrap Value

The estimated resale value of an asset at the end of its useful life, often considered in depreciation calculations.

Salvage Value

The expected market value an asset will achieve when it is disposed of after its life cycle.

Payback Period

The length of time it takes for an investment to recover its initial cost out of the cash inflows that it generates.

Simple Rate of Return

A method of investment appraisal that calculates the annual incremental net operating income as a percentage of the initial investment.