The Immune System Can Be Made Vulnerable to Allergens,bacteria,and Viruses

question 21

Multiple Choice

The immune system can be made vulnerable to allergens,bacteria,and viruses through the action of

• A) some synthetic chemicals.
• B) ionizing radiation.
• C) viruses like HIV.
• D) all of these answers
• E) none of these answers

---

Definitions:

Selective Gene Expression

This describes the process by which certain genes are activated to produce a specific set of proteins in different cell types, conditions, or stages of development.

Cell Differentiation

The process by which a less specialized cell becomes a more specialized cell type, crucial in development and specialization of functions.

Embryo

In animals, a developing individual from first cleavage until hatching or birth; in humans, usually refers to an individual during weeks 2 to 8 of development.

Human Motivation

The psychological forces that determine the direction of a person's behavior in an organization, a person's level of effort, and a person's level of persistence.