Questions 1. What was the effect of increasing extracellular K+ to 100 mM on the membrane's potential? 2. Explain why the above change occurred.

Q5.8. In a neuron with a Vm of 0, there is a high concentration of K* inside of the cell and a low concentration outside. Which statement below is TRUE? If K+ channels were open and the electrical forces were absent, diffusion would result in a net movement of K* out of the cell. If K+ channels were closed, Na* would flow into the neuron. If K+ channels were open and the effect of diffusion was absent, the electrical forces would move K+ out of the cell. The membrane potential would be at the K* equilibrium potential, because concentrations of K* are not balanced. Submit

Question 3 of 18 28. Concerning concentration differences across the plasma membrane, there are Select the correct response: more K+ and Na+ ions inside the cell than outside. more K+ inside the cell than outside and more Na+ ions outside the cell than inside. more K+ and Na+ ions outside the cell than inside. more K+ outside the cell than inside and more Na+ ions inside the cell than outside.

22- For EPSP, which is the most important ion flow: A. Sodium ions diffuse out of the cell. C. Sodium ions diffuse into the cell. B. Potassium ions diffuse out of the cell. D. Potassium ions diffuse into the cell.