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) the depolarization of the neuron.
B) the 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

An increase in the movement of potassium ions out of the cytoplasm would result in hyperpolarization of the neuron since it would further increase the negative potential within the cell. This is because potassium ions are positively charged and their movement out would make the internal environment of the neuron more negatively charged.

For a Neuron with an Initial Membrane Potential at -70