If a Person Is Given Antigen X and Is Later

question 26

Multiple Choice

If a person is given antigen X and is later given antigen Y, a(n) _____ response to antigen Y will result.

• A) primary
• B) secondary
• C) determinant
• D) immunosuppressive

---

Definitions:

Marginal Cost

The change in total cost that arises when the quantity produced is incremented by one unit; essentially, the cost of producing one more unit of a good.

Product-Variety Externality

An economic effect where an individual's consumption choices can lead to an increase in the variety of products available, potentially benefiting other consumers.

Negative Externality

A cost that affects a party who did not choose to incur that cost, often associated with production or consumption activities.