Physiology Of Immune System

Front 1

Which of these offers a nonspecific defense against a viral infection

a)antibodies b)leukotrienes c)interferon d)histamine

Back 1

c) interferon

Front 2

What does this cell secrete

killer T cells

Back 2

perforins

Front 3

What do mast cells secrete

Back 3

histamine

Front 4

What do plasma cells secrete

Back 4

antibodies

Front 5

What do macrophages secrete

Back 5

lysosomal enzymes

Front 6

Which of these staements about the Fab portion of antibodies is true

a)it binds to antigens b)its amino acid sequences are variable c)it consists of both H and L chains d)all

Back 6

d) all

Front 7

Which of these statements about complement proteins C3a and C5a is false

a)They are released during the complement fixation process b)they stim. chemotaxis of phagocytic cells c)they promote the activity of phagocytic cells d)they produce pores in the victim cell membrane

Back 7

d) they produce pores in th evictim cell membrane

Front 8

Mast cell secreation during an immediate hypersensitivity reaction is stimulated when antigens combine with

a)IgG antibodies b)IgE antibodies c)IgM antibodies d)IgA antibodies

Back 8

b)IgE antibodies

Front 9

During a second immune response

a)antibodies are made quickly and in great amts b)antibody production lasts longer than in a primary response c)antibodies of the IgG class are produced d)lymphocyte clones are believed to develop e)all

Back 9

e) all

Front 10

Which of these cell types aids the activation of T lymphocytes by antigens

a)macrophages b)neutrophils c)mast cells d) natural killer cells

Back 10

a)macrophages

Front 11

Which of these statements about Tlymphocytes is false? Some

a)T cells promote the activity of B cells b)T cells suppress the activity of B cells c)Tcells secrete interferon d)T cells produce antibbodies

Back 11

d) T cells produce antibodies

Front 12

Delayed hypersensitivity is mediated by

a)T cells b) B cells c)plasma cells d)natural killer cells

Back 12

a) T cells

Front 13

Active immunity may be produced by

a)contracting a disease b)receiving a vaccine c)receiving gamma globulin injections d) A&B e) B&C

Back 13

d) contracting a disease & receiving a vaccine

Front 14

Which of these statements about class-2 MHC molecules is true

a)they are found on the surface of B-lymphocytes b)they are found on the surface of macrophages c)they are required for B cell activation by foreign antigen d)they are needed of interaction of helper and killer T cells e)they are presented together w/ foreign antigens by macrophages

Back 14

c) they are required for B cell activation by a foreign antigen

Front 15

Describe the cytokine interleukin-1

Back 15

stimulates ACTH secretion

Front 16

Describe cytokine interleukin-2

Back 16

stimulates proliferation of killer T lymphocytes

Front 17

describe cytokine interleukin-12

Back 17

stimulates formation of tH1 helper T lymphocytes

Front 18

Which of these statements about gamma interferon is false

a)It's a polypeptide autocrine regulator b)it can be produced in response to viral infections c)it stims. the immune system to attack infected cells and tumors d)it's produced by almost all cells in the body

Back 18

d) it's produced by almost all cells in the body