B Cells That Interact with Helper T Cells Are Stimulated

question 8

Multiple Choice

B cells that interact with helper T cells are stimulated to differentiate when

• A)B cells produce antibodies.
• B)B cells release cytokines.
• C)helper T cells present the class II MHC molecule-antigen complex on their surface.
• D)helper T cells differentiate into cytotoxic T cells.
• E)helper T cells release cytokines.

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Definitions:

Marginal Costs

The amount spent on producing an extra unit of a product or service.

Fixed Costs

Costs that do not vary with the level of output or sales in the short term, such as rent or salaries.

Sunk Costs

Costs that have already been incurred and cannot be recovered or refunded, and thus should not factor into future decision-making processes.

Fixed Costs

Fixed expenditures that are unaffected by changes in production or sales volumes, like rent, wages, and insurance costs.