Respuesta :
A. Hyperpolarize (more negative) because there is more K+ inside at RMP, so to go down its gradient, it moves out. More leak channels, more positive charge leaves.
B. Depolarize (more positive) because there is more Na+ outside at RMP, so Na+ going down its gradient would be moving into the cell.
C. Hyperpolarize (less positive = more negative) because this statement means decreasing the Na+ gradient, which means not as much Na+ will enter the cell.
D. Depolarize (more positive). K+ leak channels let K+ out of the cell by simple diffusion, but now the K+ channels are closed, so less K+ leaves.
E. Depolarize (less negative = more positive). This reduces the K+ gradient. Less K+ is likely to leak out of the cell. Not to mention all of that charge repulsion!
F. No change. Changing the size of the cell does not affect RMP a lot. All this means is there is more K+ inside the cell, but there is now more Na+ outside the cell, so there is still a steady state potential across the cell membrane. What determines whether a cell depolarizes or hyperpolarizes is the presence of functional channels and whether they are closed or opened.
B. Depolarize (more positive) because there is more Na+ outside at RMP, so Na+ going down its gradient would be moving into the cell.
C. Hyperpolarize (less positive = more negative) because this statement means decreasing the Na+ gradient, which means not as much Na+ will enter the cell.
D. Depolarize (more positive). K+ leak channels let K+ out of the cell by simple diffusion, but now the K+ channels are closed, so less K+ leaves.
E. Depolarize (less negative = more positive). This reduces the K+ gradient. Less K+ is likely to leak out of the cell. Not to mention all of that charge repulsion!
F. No change. Changing the size of the cell does not affect RMP a lot. All this means is there is more K+ inside the cell, but there is now more Na+ outside the cell, so there is still a steady state potential across the cell membrane. What determines whether a cell depolarizes or hyperpolarizes is the presence of functional channels and whether they are closed or opened.
