Under which of the following conditions would T-cell activation be LEAST likely to occur?
A. Macrophages are incubated with antigen, then fixed with paraformaldehyde, then incubated with antigen-specific T cells.
B. Macrophages are fixed with paraformaldehyde, then incubated with antigen, then incubated with antigen-specific T cells.
C. Macrophages are fixed with paraformaldehyde, then incubated with digested antigen, then incubated with antigen-specific T cells.
D. Macrophages are incubated with digested antigen, then fixed with paraformaldehyde, then incubated with antigen-specific T cells.
E. Macrophages are incubated with antigen and then incubated with antigen-specific T cells.
B
You might also like to view...
________ training is a type of exercise training that includes repeated sessions of high-intensity exercise alternated with periods of lower-intensity exercise
A) Endurance B) Interval C) Cross D) Strength
Teachers are at an advantage for observing changes in a student's appearance or behavior because they
A. can compare a student to their age-cohort of peers. B. are mandated reporters. C. are skillfully trained as observers. D. have contact with both the family and the child.
An example of a tangible stressor is
A) worrying about an upcoming exam. B) a confrontation with an angry coworker. C) feeling nervous about making a public speech. D) thinking about the next family vacation.
What is a myocardial infarction?
A. stroke B. blood clot C. chest pain D. heart attack E. cerebral hemorrhage