In pavlov's experiments, the ringing of a bell was a(n) a. unconditioned response. b. conditioned stimulus. c. conditioned response. d. unconditioned stimulus.

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian

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 the sl unit used to measure temperature a. kilogram b. liter c. meter d. kelvin