HIV Targets CD4-Expressing T Cells

question 203

Multiple Choice

HIV targets CD4-expressing T cells.One of the long-term results of this is

• A) a decrease in the ability of B cells to produce memory B cells.
• B) an increase in the ability of macrophages to recognize specific antigenic determinants.
• C) loss of the gene coding for CD4.
• D) an increase in T-helper cells.
• E) an increase in class II MHC proteins.

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Definitions:

Altruism

A special form of helping behavior, sometimes costly, that shows concern for fellow human beings and is performed without expectation of personal gain.

Helping Behaviour

Acts that intentionally benefit someone else.

Expensive Donations

Large or costly contributions made to support a cause, organization, or individual.

Altruistic Behaviour

Actions taken to benefit others without expecting anything in return, often at a cost to oneself.