EXAM I Review Immunoglobins

Question 1

Mediates Allergic Responses

Answer 1

IgE

Question 2

Is found on the surface of Mast B cells

Answer 2

IgE

Question 3

Is found primarily on the surface of B cells

Answer 3

IgD

Question 4

Is found primarily in secretions

Answer 4

IgA

Question 5

Is especially good at “opsonizing”

Answer 5

IgG

Question 6

Is especially good at “fixing complement”

Answer 6

IgM

Question 7

Has no known function

Answer 7

IgD

Question 8

Crosses the placenta

Answer 8

IgG

Question 9

is dimeric

Answer 9

IgA

Question 10

is pentameric

Answer 10

IgM

Question 11

Is present in Saliva and other secretions

Answer 11

IgA

Question 12

Has the longest half-life

Answer 12

IgG

Question 13

Has the shortest half-life

Answer 13

IgE

Question 14

Is especially important in hemagglutination (transfusion) reactions

Answer 14

IgM

Question 15

Can be bactericidal in the presence of lysozyme

Answer 15

IgA

Question 16

Is co-expressed with IgD on the surface of B cells

Answer 16

IgM

Question 17

Undergoes “transcytosis”

Answer 17

IgA

Question 18

Binds the “poly Ig receptor”

Answer 18

IgA

Question 19

May have a role in protecting against parasitic worms (helminthes)

Answer 19

IgE

Question 20

Is especially useful for passive immunization

Answer 20

IgG

Question 21

Is the best agglutinating antibody

Answer 21

IgM

Question 22

Is the second best agglutinating antibody

Answer 22

IgA

Question 23

Binds to Fc receptors on macrophages

Answer 23

IgG

Question 24

Is the first antibody to appear in serum after antigenic exposure

Answer 24

IgM

Question 25

Is an indicator of recent or acute infection of immunization

Answer 25

IgM

Question 26

Has two subtypes

Answer 26

IgA

Question 27

Has four subtypes

Answer 27

IgG

Question 28

Is associated with the "secretory component"

Answer 28

IgA

Question 29

Is, by concentration, the dominant antibody in serum

Answer 29

IgG

Question 30

Antibody with the lowest concentration in serum

Answer 30

IgE