Fill in the blanks below: 1.) the complement system is a barrier of the immune system. 2.) the complement system is a group of in the blood that detect pathogens that have entered the body. 3.) the complement system can cause the swelling of a part of the body accompanied by redness, swelling, and pain as a response to infection.

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.