Cell-mediated immunity

Question 1

In cell-mediated immunity is when

Answer 1

• An antigen is recognized and bound
• A small number of T cells proliferate and differentiate into a clone of effector cells
• The antigen is eliminate

Question 2

Antibody-mediated immunity is when

Answer 2

• An antigen is recognized and bound
• Helper T cells costimulate the B cell so the B cell can
  proliferate and differentiate into a clone of effector
  cells that produce antibodies
• The antigen is eliminated

Question 3

IgG

Answer 3

-most abundant
-protects against bacteria and viruses

Question 4

IgA

Answer 4

Found mainly in sweat,tears,saliva,mucus,breast milk, and digestive secretions

Question 5

IgM

Answer 5

first antibody class to be secreted by plasmocytes after initial exposure to antigen

Question 6

IgD

Answer 6

mainly found on surfaces of B cells as antigen receptors

Question 7

IgE

Answer 7

involved in allergic and hypersensitivity reactions:provides protection against parisitic worms

Question 8

Naturally acquired active immunity follows exposure to a microbe

Answer 8

antigen recognition by B cells and T cells and costimulation lead to formation of antibody-secreting plasmocytes, cytotoxic T cells, and B and T memory cells.

Question 9

Naturally acquired passive immunity is when

Answer 9

IgG antibodies are transferred from mother to fetus
across placenta, or IgA antibodies are transferred
from mother to baby in milk during breast-feeding

Question 10

Artificially acquired active immunity

Answer 10

Antigens introduced during vaccination stimulate
cell-mediated and antibody mediated immune
responses, leading to production of memory cells

Question 11

Artificially
acquired passive
immunity
is

Answer 11

Intravenous injection of immunoglobulins
(antibodies)

Question 12

Cytotoxic T cell

Answer 12

Kills host target cells

Question 13

Helper T cell

Answer 13

Cooperates with B cells to amplify antibody production