if the element helium (he) has two protons and two neutrons, what are the atomic number and atomic mass?

What is the most appropriate method of gaining weight (muscle mass)

What is the main fuel source for the work of the cell

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.