T Cells May Be Important for Recognition of Common Antigens

question 7

Multiple Choice

T cells may be important for recognition of common antigens at epithelial boundaries between the host and the external environment. The T cells differ from the αβ T cells in which one of the following ways?

• A) T cells recognize only nonprotein antigens.
• B) T cells are not MHC-restricted and do not recognize MHC-associated antigens.
• C)The TCR complex contains CD3ƴ or CD3Ϭ but not CD3Ϭ.
• D)Most mature T cells express either CD4 or CD8 but not both.
• E) T cells lack key biologic activities, including the ability to lyse target cells.

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Definitions:

Labor Supply Curve

A visual diagram illustrating how the quantity of labor supplied is influenced by changes in the wage rate.

Leisure

Free time available to individuals when they are not engaged in work or essential activities, often used for relaxation or recreation.

Labor Supply Curve

A graphical representation that shows the relationship between the quantity of labor willing to be provided and the wage rate.

Nonlabor Income

Income received from sources other than direct employment or work, such as investments, pensions, or transfer payments.