Which of the following is not an internal or external factor that controls cell division? a. When a neighboring cell grows, its cell membrane is touching its neighbor.
b. Signal receptors on the inside of the cell membrane detect overstretching of the cell
membrane when a cell gets too large.
c. chemical messengers like kinase and cyclin
d. Apoptosis is a special set of controlled steps in which a cell dies intentionally.

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.

Which of the following is not a type of epithelial cell

You do things keep your body in balance everyday what things do you try to keep balanced in your everyday life