Which of the following represents a "role" that the liver plays in the body? A- Helps control blood pressure
B- Extracts waste from blood
C- Synthesizes protein from amino acids ingested through
food
D- Removes carbon dioxide (CO2) from the body
E- None of the above

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.