Chapter 20

3 When B and T cells are fully developed and mature, they are described as being A) Immunocompetent B) Pluripotent stem cells C) Primary lymphatic cells D) Specifically promoted E) Germ cells

A

3 Which cell kills infected body cells and tumor cells? A) Natural killer cells B) Perforins C) platelets D) Mucus E) Antimicrobial proteins

A

4 Where do T cells become immunocompetent? A) thymus B) bone marrow C) tonsils D) thyroid gland

A

5 Which class of cells includes macrophages, B cells and dendritic cells? A) Antigen presenting cells B) Primary lymphocytes C) T cells D) RBC E) Epitope cells

A

5 Which of these provides a non-specific cellular disease resistance mechanism? A) Macrophages B) T lymphocytes C) B lymphocytes D) Memory B cells E) Stratified squamous epithelium

A

3 Natural exposure to an infectious agent leads to: A) Passive immunity B) Active immunity C) Both of these choices D) None of these choices

B

3 To become activated, which requires being bound to a foreign antigen AND simultaneous co-stimulation? A) B Cell B) T Cell C) Interferon D) MHC antigen E) Antigen presenting cell

B

3 Which induces the production of a specific antibody? A) Phagocytosis B) Antigen C) Antibody D) Defensin E) Immunoglobulin

B

3 Which type of adaptive immunity will result from mother-to-baby IgA transfer via breast feeding? A) naturally acquired active immunity B) naturally acquired passive immunity C) artificially acquired active immunity D) artificially acquired passive immunity E) None of these choices

B

4 Fever is initiated by chemicals called__________. A) leukotrienes B) pyrogens C) histamines D) febrins

B

4 What initiates T cell activation? A) T cell activation begins when a T cell is ingested by a macrophage. B) T cell activation begins with a cell processing and displaying antigen fragments on its MHC molecules. C) T cell activation begins when the T cell differentiates into effector cells and memory cells. D) T cell activation begins with the interaction of the T cell with other molecules on the cells called co-stimulators.

B

Most important cell in immunity and interact with MHC Class II antigens? A) Cytotoxic T cells B) Helper T Cells C) Memory T Cells D) MHC antigens E) B cells

B

1 The primary response will peak how many days after an exposure? A) 1 day or less B) 2 - 7 C) 10 - 17 D) 20 - 30 E) Over a month

C

3 Which anti-microbial substances promote cytolysis, phagocytosis and inflammation? A) Transferrins B) Perforins C) Complement proteins D) Defensins E) Interferons

C

3 Which of the following intensifies the effect of interferons and promotes the rate of repair? A) Complement proteins B) Perforin C) Fever D) Macrophages E) Natural killer cells

C

4 B cells develop and mature in the: A) liver. B) lymph nodes. C) bone marrow. D) thymus.

C

5 An acute allergic response can lead to: A) transplantation B) retroviruses C) anaphylactic shock D) passive immunity E) active immunity

C

5 The ability of an antigen to react specifically with the antibodies or cells it has provoked is called A) Specificity B) Immunogenicity C) Reactivity D) Epitopes E) Immune Response

C

5 Which cell is considered to be the most important cell in the immune system? A) Cytotoxic T Cells B) B lymphocytes C) T Helper cells D) Eosinophils E) macrophages

C

3 Which cells increase the permeability of blood vessels by releasing histamine? A) neutrophils B) eosinophils C) lymphocytes D) mast cells E) macrophages

D

3 Which is part of the body's second line of defense? A) Mucous cells B) Germ cells C) B and T Lymphocytes D) Natural killer cells E) None of these choices

D

3 Which of the following is NOT a sign of inflammation? A) Redness B) Pain C) Heat D) Mucus production E) Swelling

D

3 Which organ produces a hormone that promotes maturation of T cells? A) Spleen B) Lymph node C) Red bone marrow D) Thymus E) Pancreas

D

3 Which type of adaptive immunity will result from intravenous injection of immunoglobulins? A) naturally acquired active immunity B) naturally acquired passive immunity C) artificially acquired active immunity D) artificially acquired passive immunity E) None of these choices

D

4 Surface barriers, such as cutaneous and mucous membranes, serve the immune system as the: A) third line of defense. B) second line of defense. C) fourth line of defense. D) first line of defense.

D

4 Vaccinations involve exposure to an antigen to elicit: A) passive immunity. B) a secondary immune response. C) severe allergic reaction. D) a primary immune response.

D

3 Antigens that induce an allergic reaction are called A) lymphotoxin B) perforin C) granulysin D) interleukin-1 E) allergen

E

3 Which antimicrobial substances reduce viral replication (in uninfected cells)? A) Transferrins B) Perforins C) Complement proteins D) Defensins E) Interferons

E