McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

What is required for the activation of helper T cells?

A. contact with an antigen-presenting macrophage
B. contact with the matching antibody
C. attachment to an infected cell's membrane
D. infection with a virus


2. Why is the HIV virus so deadly?

A. It causes anemia.
B. It prevents the production of antibodies.
C. It knocks out all the helper T cells.
D. All of these are correct.
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