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Which of the following might occure after a helper T cell is presented with a processed antigen and interacts with a B cell?
A) Helper T cells destroy the presenting cell
B) Helper T cells produce antibodies
C) Helper T cells release interleukins that stimulate B cells to clone
D) Helper T cells stop division
E) Helper T cells lyse

Several days after an initial contact with an antigen, antibody titer increases. This is a
A) primer response
B) primary response
C) precipitatin response
D) principle response
E) cascade response

2007-03-21 02:13:09 · 2 answers · asked by Anonymous in Science & Mathematics Biology

2 answers

Ist question = C. Helper T cells release interleukins that stimulate B cells to clone (and produce the right antibody).

2nd question = B. If it is the first time the body is exposed to this antigen, it will take several days for the titer to go up and initially the production of IgM antibodies is the quickest response. This is called the primary response. The secondary response is on subsequent presentation of the same antigen. The response time is shorter and IgG antibodies are produced very quickly.

2007-03-21 02:55:21 · answer #1 · answered by misoma5 7 · 0 0

1 is c

2 is b

2007-03-21 02:17:32 · answer #2 · answered by cyan03 2 · 1 0

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