Which statement best describes the difference in responses of effector B cells (plasma cells) and cytotoxic T cells?
A) B cells confer active immunity; cytotoxic T cells confer passive immunity.
B) B cells kill pathogens directly; cytotoxic T cells kill host cells.
C) B cells secrete antibodies against a pathogen; cytotoxic T cells kill pathogen-infected host cells.
D) B cells carry out the cell-mediated response; cytotoxic T cells carry out the humoral response.
E) B cells respond the first time a pathogen is present; cytotoxic T cells respond subsequent times.
Answer: C
You might also like to view...
In T4 phages, which of the following makes the initial contact with the appropriate receptor site?
A. Tail tube B. Collar C. Base plate D. Tail fiber
After initial infection, some infectious agents go into a dormancy, or ________, but may re-emerge to produce a recurrent disease state.
A) reservoir state B) latency C) symptomatic state D) sequelae
Adult stem cells are just as totipotent as embryonic stem cells.
Answer the following statement true (T) or false (F)
A good Grocott methenamine silver stain shows organisms with a crisp black cell wall and a visible internal structure
a. true b. false