Question

Essay 1. Explain how the equilibrium potential for potassium is generated. (5 pts)

Answer 1

so , when the potassium with outside concentration of 5mM & inside concentration of 140mM then Equillibrium potential for potassium of -88.2 mV is acheived . K ions move inside the cell via leaky potassium channels .

When a cell undergo hypen polarization followed by repolarization due to opening of leaky kt channels, kt conc. inside the cell increases and outside the cell dear eases and cell ondergo heperpolarization untill kt Equilli brium is reached ie Ek = -88 m v with 5 mM KT outside and 140mm kt inside. - Eion = 61 log Cion Joutside ([on] inside = 61 log [ 5 ] = -88.2 mv 2