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The first line of cellular defense against pathogens are the

The first line of cellular defense against pathogens are the

A) T lymphocytes.

B) B lymphocytes.

C) NK cells.

D) phagocytes.

E) plasma cells.

32) Which of the following acts as the earliest form of defense against exogenous pathogens in the list?

A) inflammation

B) lymphocytes

C) macrophages

D) skin

33) An inflammatory response is triggered when

A) red blood cells release pyrogens.

B) T lymphocytes release interferon.

C) mast cells release granules containing histamine and heparin.

D) neutrophils phagocytize bacteria.

E) blood flow to an area increases.

34) Lymphocytes that attack foreign cells or body cells infected with viruses are

A) B lymphocytes.

B) plasma cells.

C) helper T cells.

D) cytotoxic T cells.

E) suppressor T cells.

35) Cells that help to regulate the immune response are

A) B lymphocytes.

B) plasma cells.

C) helper T cells.

D) cytotoxic T cells.

E) NK cells.

36) The cells that are actively involved in immunological surveillance are the

A) NK cells.

B) plasma cells.

C) B lymphocytes.

D) helper T cells.

E) suppressor T cells.

37) Stem cells that will form T lymphocytes are modified in the

A) bone marrow.

B) liver.

C) spleen.

D) thymus.

E) kidneys.

38) ________ is the immunoglobulin class that comprises 75% of antibodies in adult blood.

A) IgA

B) IgD

C) IgE

D) IgG

E) IgM

39) Immunoglobulins that are mainly responsible for resistance against viruses, bacteria, and bacterial toxins are

A) IgA.

B) IgD.

C) IgE.

D) IgG.

E) IgM.

40) Immunoglobulins that attach to mast cells and are involved in allergic reactions are

A) IgA.

B) IgD.

C) IgE.

D) IgG.

E) IgM.

Dec 11 2019 View more View Less

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