For a neuron with an initial membrane potential at -70 mV, an increase in the movement of potassium ions out of that neuron's cytoplasm would result in
A)depolarization of the neuron.
B)hyperpolarization of the neuron.
C)the replacement of potassium ions with sodium ions.
D)the replacement of potassium ions with calcium ions.
E)the neuron switching on its sodium-potassium pump to restore the initial conditions.

Question

Quizplus · Accepted Answer

Potassium ions are positively charged and their movement out of the neuron would result in an increased distribution of negative charge inside the neuron, making it more negative and resulting in hyperpolarization. This is because the outside of the neuron is positively charged relative to the inside and the movement of positively charged ions out of the cell increases this difference.

For a Neuron with an Initial Membrane Potential at -70