6. One quote states, “Churning currents in the molten rocks below propel them along like a jumble of conveyor belts in disrepair.” What is a conveyor belt? Why is this a good or bad analogy for convection currents? What does including the word “disrepair” imply?

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.