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 the ________.
A) depolarisation of the neuron
B) hyperpolarisation of the neuron
C) replacement of potassium ions with sodium ions
D) replacement of potassium ions with calcium ions

Question

Quizplus · Accepted Answer

An increase in the movement of potassium ions out of the neuron's cytoplasm would result in hyperpolarization of the neuron. This is because more positively charged potassium ions are leaving the cell, making the inside of the cell more negative and further away from the threshold needed to trigger an action potential.

For a Neuron with an Initial Membrane Potential at -70