1. A. Create an action potential and on the same graph inclde the changes in only the sodium conductance (gNa+). You can indicate the shape with solid line, (gNa). You can indicate the shape with shape with solid line, g Na+ dotted line, or however you prefer. Remember to include the labels for the axes. (rather than drawing the graph if you can describe it.)

B. What portion(s) of the AP are most influenced by the voltage-gated K+ channels?

2. A person complains of a strange sensation in their arms. You run some tests and you discover the duration of their action potential is increased. Based on what you know about the ionic basis for the action potential, what would you think might be wrong?

3. You also run some tests on the conductance velocity of the action potential and discover that it is slower than normal. What would you hypothesize might be the problem?
4. Can you get a neuron to fire action potentials at any rate or is there a time limitation? briefly explain your answer.
5. Define or describe the following terms:
A. Threshold of an action potential
B.Hyperpolarization or undershoot of an action