Unit 4 Objectives

Question 1

T independent antigen

Answer 1

Antigens that stimulate B cells without the help of T cells.
Human immune system recognizes ~10^15 antigens

Question 2

5 protective results of antigen-antibody complex formation.

Answer 2

1. Aggultination
2. Opsonization
3. Antibody-dependent cell-mediated cytotoxicity
4. Neutralization
5. Compliment activation

Question 3

Agglutination

Answer 3

Antibodies cause antigens to clump together.

This reduces the number of antigens the host has to deal with

Question 4

Opsonization

Answer 4

coats the antigen with antibodies.

This enhances phagocytosis

Question 5

Antibody dependent cell mediated cytotoxicity

Answer 5

resembles opsonization; but microbe is not engulfed by the immune system

Question 6

Neutralization

Answer 6

IgG blocks attachment of viruses and toxins to host cells.

Question 7

Compliment activation

Answer 7

inflammation, cytolysis, and phagocytosis.

Question 8

Cellular Immunity

Answer 8

T cells combat intracellular pathogens. They recognize cells that are non-self.