At Age 85, Lyle's Immune System Does Not Respond to Vaccines

question 58

Multiple Choice

At age 85, Lyle's immune system does not respond to vaccines as well as it did when he was younger. The atrophy of which endocrine gland is likely responsible for this?

• A) anterior pituitary
• B) adrenal
• C) thymus
• D) thyroid

---

Definitions:

Demand Curve

A graph showing the relationship between the price of a good and the quantity of that good that buyers are willing to purchase.

Marginal Value

Refers to the additional benefit derived from consuming or producing one more unit of a good or service.

Slopes Downward

Describes a line on a graph that represents a decrease in one variable as another variable increases, typically associated with demand curves.

Consumer Surplus

The difference in the total funds consumers are willing and able to disburse for a good or service compared to the actual expenditure.