41. Immune System

B-cells are primarily involved in ______-mediated immunity.

How do antibodies to foreign blood groups come to exist in the body?

A type of cell that makes immunizations effective is the __________.

Why is HIV a dangerous pathogen?

Which of the following cell types carries out humoral immunity?

Besides helper T cells, what are two other types of cells that HIV infects?

A viral infection in a cell results in __________.

Once you have been exposed to an antigen, you develop immunity against the same antigen because __________.

Which of the following is a characteristic of adaptive immunity?

The body produces antibodies complementary to foreign antigens. The process by which the body comes up with the correct antibodies to a specific invader is most like __________.

The antigen-binding sites of an antibody molecule are formed from the molecule's variable regions. Why are these regions described as variable?

Why does our immune system not usually attack our own healthy tissues?

When searching for a donor for an organ transplant, doctors try to match the __________ of the donor and recipient as closely as possible.

New flu shots are needed every year to protect against infection because of __________.

The proliferation of the B lymphocyte to which a specific antigen binds is referred to as __________.