Use the Following Information to Answer the Following Questions

question 73

Multiple Choice

Use the following information to answer the following questions.
An otherwise healthy student in your class is infected with EBV, the virus that causes infectious mononucleosis. The same student had already been infected when she was a child, and she had merely experienced a mild sore throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick.
-What are CD4 and CD8?

• A)proteins secreted by antigen-presenting cells
• B)receptors present on the surface of natural killer (NK)cells
• C)T-independent antigens
• D)molecules present on the surface of T cells where they enhance cellular interaction
• E)molecules on the surface of antigen-presenting cells where they enhance B cell activity

---

Definitions:

Mono-Culture

The agricultural practice of growing a single crop species over a wide area for many consecutive years, potentially leading to decreased biodiversity and increased vulnerability to pests and diseases.

American Culture

The set of customs, traditions, and values shared by the people of the United States, influenced by its history and diverse ethnic backgrounds.

Unique

Being the only one of its kind; unlike anything else in terms of characteristics, qualities, or features.

Anti-Pollution Standards

Regulations designed to limit or control the release of pollutants into the environment to protect ecological and human health.