EXAM I Review Immunoglobins Flashcards

1
Q

Mediates Allergic Responses

A

IgE

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2
Q

Is found on the surface of Mast B cells

A

IgE

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3
Q

Is found primarily on the surface of B cells

A

IgD

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4
Q

Is found primarily in secretions

A

IgA

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5
Q

Is especially good at “opsonizing”

A

IgG

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6
Q

Is especially good at “fixing complement”

A

IgM

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7
Q

Has no known function

A

IgD

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8
Q

Crosses the placenta

A

IgG

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9
Q

is dimeric

A

IgA

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10
Q

is pentameric

A

IgM

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11
Q

Is present in Saliva and other secretions

A

IgA

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12
Q

Has the longest half-life

A

IgG

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13
Q

Has the shortest half-life

A

IgE

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14
Q

Is especially important in hemagglutination (transfusion) reactions

A

IgM

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15
Q

Can be bactericidal in the presence of lysozyme

A

IgA

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16
Q

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

A

IgM

17
Q

Undergoes “transcytosis”

A

IgA

18
Q

Binds the “poly Ig receptor”

A

IgA

19
Q

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

A

IgE

20
Q

Is especially useful for passive immunization

A

IgG

21
Q

Is the best agglutinating antibody

A

IgM

22
Q

Is the second best agglutinating antibody

A

IgA

23
Q

Binds to Fc receptors on macrophages

A

IgG

24
Q

Is the first antibody to appear in serum after antigenic exposure

A

IgM

25
Q

Is an indicator of recent or acute infection of immunization

A

IgM

26
Q

Has two subtypes

A

IgA

27
Q

Has four subtypes

A

IgG

28
Q

Is associated with the “secretory component”

A

IgA

29
Q

Is, by concentration, the dominant antibody in serum

A

IgG

30
Q

Antibody with the lowest concentration in serum

A

IgE