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The Immune System

The function ...

Question

The function of IgE is

A

Stimulation of complement system, passive immunity to foetus

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B

Protection from inhaled/ingested pathogens

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C

Mediate in allergic response

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D

Activation of B-cells

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Solution

The correct option is C
Mediate in allergic response

An allergic response mounts significant IgE responses only as a defense against parasitic infections

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Similar questions

Q. Identify the immunoglobulins (i), (ii), (iii) and (iv) and select the correct option.

(i) It is only antibody that can cross placenta and confer immunity to foetus.

(ii) It is mediator in allergic reactions and activates histamine secreting cells.

(iii) It is the one that first activates in an initial attack of antigen.

(iv) It has role in activating and suppressing lymphocyte activity.

Q. Distinguish between the following:, (a) cell-mediated immunity and humoral immunity, (b) active and passive immunization

Q. If a person is infected with deadly pathogen/toxin against which quick immune response is required, ready-made antibodies are directly given to protect that person based on the principle of passive immunity. Select the option that does not represent a case of passive immunity.

Select the correct option.

Statement 1: Allergens causes an exaggerated response of the immune system

Statement 2: Mast cells on exposure to allergens produce only histamines

Statement 3: When a body gets exposed to active microorganisms from nature it is called natural passive immunity.

Q. Cells of the immune system responsible for the humoral response to a pathogen include all of the following except.

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