Suppose you stimulate an axon so that you generate an actionpotential at both ends at the same instant. Describe thepropagation of these action potentials. What happens when theymeet?

Why does an action potential move in an all-or-nothing fashion down the length of an axon without stopping?

Which of the following situations in a neuron results in action potentials that have extended depolarization phases? O None of these result in extended depolarization phase. O Compromising the inactivation mechanism in voltage-gated Na* channels. O Stimulating the voltage-gated K* channels. O Inhibiting the voltage-gated Na* channels. O Compromising the inactivation mechanism in voltage-gated K* channels.

Two excitatory synapses on a neuron fire at the same time as one inhibitory neuron. Each synapse comes from a different presynaptic neuron. Explain what happens at each synapse (in the post-synaptic neuron) and what determines whether this neuron will fire.

Imagine a neuron that has a thousand axonal terminals synapsing on it. The majority of these axonal knobs are shown to be "firing." However, the neuron in question does not fire an action potential. What could be a possible explanation as to why this could be?

Wng Why do elinated asons Conduct action potentials Faster than asons P unmyelinated

Explain how an action potential is propagated down an axon in continuous conduction. Why is saltatory conduction faster than continuous conduction?

A post-synaptic cell receives a signal that causes it to hyperpolarize. Which statement is NOT true about this dynamic? O The cell is now more negative than it was before. This describes an EPSP It will be harder for the cell to reach threshold and generate a new action potential. O This could have been achieved through either spatial or temporal summation.

We know the action potential threshold regulates whether a neuron fires an action potential or not.  What sets this threshold?  Is the action potential threshold the same for all neurons?  Why or why not?

Why does amplitude decrease in a train of action potential