physioex 9.0 exercise 3

HELP PLEASE!!!
A C T I V I T Y 1 The Resting Membrane Potential

1. Explain why increasing extracellular K_ reduces the net diffusion of K_ out of the neuron through the K_ leak channels.


2. Explain why increasing extracellular K_ causes the membrane potential to change to a less negative value. How well did the results compare with your prediction?

3. Explain why a change in extracellular Na_ did not alter the membrane potential in the resting neuron.

4. Discuss the relative permeability of the membrane to Na_ and K_ in a resting neuron.


5. Discuss how a change in Na_ or K_ conductance would affect the resting membrane potential.