Ch. 22 Hw

Question 1

Which of these is not considered a physical or chemical barrier?

Answer 1

macrophages

Question 2

When B and T cells are fully developed and mature, they are described as being

Answer 2

immunocompetent

Question 3

Which class of cells includes macrophages, B cells, and dendritic cells?

Answer 3

antigen presenting cells

Question 4

What class of disorders, including aids and scid, involves the destruction of B and T cells resulting in the inability of the immune system to protect the body from pathogens?

Answer 4

Immunodeficiency diseases

Question 5

An acute (Type I) allergic response can lead to:

Answer 5

Anaphylactic shock

Question 6

Which cell must be activated in order to achieve virtually all cell mediated immune responses?

Answer 6

helper T cells

Question 7

Which of the following is an effect of stress on the immune system?

Answer 7

inhibition of the immune system

Question 8

Which of the following is not considered an organ of the immune system?

Answer 8

pancreas

Question 9

The left subclavian vein receives lymph from the

Answer 9

thoracic duct

Question 10

Which organ produces a hormone that promotes maturation of T cells?

Answer 10

thymus

Question 11

Which of the following is a function of the lymphoid system?

Answer 11

drain excessive interstitial fluid, transport dietary lipids, carry out immune response

Question 12

Which of the following cells exist in the greatest variety in the immune system?

Answer 12

lymphocyte

Question 13

Which type of immunity defends against any type of invader?

Answer 13

nonspecific

Question 14

Which of the following is not a secondary lymphatic organ and or tissue?

Answer 14

red bone marrow

Question 15

Which of the following is considered a primary lymphoid organ?

Answer 15

bone marrow

Question 16

Cytotoxic T cells may kill infected target cells by

Answer 16

inducing apoptosis in the target cell and creating channels in the target cell membrane

Question 17

You ate some contaminated shellfish and have developed a hepatitis A infection. Your physician injects you with gamma globulin which contains antibodies to hepatitis A. This is an example of

Answer 17

Artificially acquired passive immunity

Question 18

Which of these provides a non-specific second line of defense?

Answer 18

macrophages

Question 19

Which of the following is not considered an antibody action to disable antigens?

Answer 19

deactivating the complement system

Question 20

The first signal required for activation of a T cell is

Answer 20

binding of antigen to the TCR

Question 21

___ are actively phagocytic cells

Answer 21

macrophages and neutrophils

Question 22

A secondary invasion of an antigen may produce no sign or symptoms due to the action of:

Answer 22

memory cells

Question 23

Which is not true of the cytokines?

Answer 23

are secreted by erythrocytes