Changes in the Immune System That Accompany Aging Include

question 99

Multiple Choice

Changes in the immune system that accompany aging include

• A) T cells becoming less responsive to antigens.
• B) more cytotoxic T cells responding to infections.
• C) increased numbers of T helper cells.
• D) higher levels of antibodies after initial exposure to antigens.
• E) enlargement of the thymus and increased levels of circulating thymic hormones.

---

Definitions:

Migrant Workers

Individuals who move from one region or country to another to seek employment opportunities, often in temporary or seasonal jobs.

Labor Migration

the movement of people from one area to another for the purpose of employment.

Implicit Cost

The opportunity cost associated with a firm's use of resources that it owns, measured by the income the firm foregoes by utilizing these resources in-house rather than engaging them elsewhere for profit.

Migration

The movement of people from one place to another with the intentions of settling, permanently or temporarily, at a new location.