Answer:
I don't get what you are trying to ask
At the neuromuscular junction, the arrival of acetycholine on the muscle most immediately causes a graded depolarization. Graded potentials are the changes in membrane potential that vary in size, as opposed to being all or none. Graded potential can be depolarizing or hyperpolarizing depending on the stimulus. Action potentials on the other hand always lead to depolarization of membrane and reversal of the membrane potential.
Answer:
anaphase I chromosomes separate
anaphase II sister chromatids separate