The anatomical region of a multipolar neuron where the AP is initiated is thea. soma,b. dendrites,c. axon's initial segment,d. axon terminals.

An action potential is a phenomenon that either happens completely or doesn't happen at all.

Which part of the action potential occurs when the voltage-gated Na⁺ channels are inactivating and voltage-gated K⁺ channels open?

The CNS can discriminate between strong and weak stimuli as strong stimuli __________.

During which phase of an action potential are voltage-gated K⁺ channels open, while voltage-gated Na⁺ channels are closed?

Since all APs generated by a given nerve fiber have the same magnitude, how does the CNS 'know' whether a stimulus is strong or weak?

What is the polarized membrane state? How is it maintained? (Note the relative roles of both passive and active mechanisms.)

Describe the events that must occur to generate an AP. Relate the sequence of changes in permeability to changes in the ion channels, and explain why the AP is an all-or-none phenomenon.

When admitted to the emergency room, Sean was holding his right hand, which had a deep puncture hole in its palm. He explained that he had fallen on a nail while exploring a barn. Sean was given an antitetanus shot to prevent neural complications. Tetanus bacteria fester in deep, dark wounds, but how do their toxins travel in neural tissue?