new_n_lost
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Patients with DiGeorge syndrome may fail to produce IgG in response to immunization with T-dependent antigens because
A) They have a decreased number of B cells that produce IgG.
B) They have increased numbers of suppressor T cells.
C) They have a decreased number of helper T cells.
D) They have abnormal antigen-presenting cells.
E) They cannot produce IgM during primary responses.
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| doc179
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C
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| indidoc1
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CCC
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| indidoc1
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No helper T cells== no CD40 L == no class switching 
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| keepgoing
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c
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| new_n_lost
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C Patients with DiGeorge syndrome have a decreased number of T cells��" in particular, helper T cells, which are essential for the IgG response to T-dependent antigens. These patients have normally functioning B cells and are capable of responding to T-independent antigens, or with only IgM responses (primary responses) to T-dependent antigens.
Edited by new_n_lost on 05/24/07 - 10:35 PM
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| jole
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i think there's a mix up here.the answer is C alright but the explanation is that for a previous question.please check.
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| new_n_lost
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Mistake is Chked n Corrected. Jole u shud become my editor it really helps to a have a friend to point out the mistakes. Totally Honored n Obligated Thanks a lot buddy.
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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
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| indidoc1
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| rock
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c
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| lq2006
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C
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| Addicudo
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No Thymus ... No helper T cells TO CD40 L linking and therefore .. no class switching
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| Capricious
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c
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