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Homework answers / question archive / The ability to mount an efficient secondary antibody response depends on a
The ability to mount an efficient secondary antibody response depends on
a. Memory T and B cells
b. High concentrations of IgA antibody
c. Cross-linking of IgM antibodies
d. All of the above are correct
I choose answer (d)
32. A natural barrier to the intestine is provided by the extremely alkaline environment of the stomach contents. (Does the alkalinity of the stomach provide a natural defense against disease?)
a. True
b. False
My choice is False since the stomach is acidic.
For 29, you have chosen the incorrect answer. The correct answer is A. A secondary response relies on the presence of previously activated B and/or T cells that have developed into memory cells. These are able to respond to an infection faster than naive (never-activated) B/T cells. B and C play no role in this process. IgA is the antibody found at mucosal sites (eg: in milk), while IgM is the antibody subclass employed early in a response.
For 32, I would agree with your reasoning. The acidity of he stomach does provide a barrier against infection, but it appears to be a trick question.
