Which of the Following Is Crucial to Activation of the Adaptive

question 9

Multiple Choice

Which of the following is crucial to activation of the adaptive immune response?

• A) memory cells
• B) presentation of MHC (major histocompatibility complex)-antigen complex on a cell surface
• C) somatic hypermutation
• D) phagocytosis of antibody-antigen complex by macrophages in the blood (the humoral response)

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Definitions:

Aggregate Demand

The total demand for all goods and services within an economy at given price levels and in a given time period.

Short Run

A period during which at least one of a firm's inputs is fixed, only allowing the firm to vary some inputs while others remain unchanged.

Long Run

In economics, a period of time during which all factors of production and costs are variable, allowing full adjustment to any change in the market.

ARRA

The American Recovery and Reinvestment Act of 2009, a stimulus package aimed at helping the United States recover from the Great Recession.