When a neuron membrane is "at rest," which of the following is true?
A) There are large amounts of potassium (K+)ions inside the cells.
B) There are large amounts of sodium (Na+)ions inside the cells.
C) The potassium (K+)and sodium (Na+)ions are in balance.

Question

When a neuron membrane is "at rest," which of the following is true?​
A) ​There are large amounts of potassium (K+)ions inside the cells.
B) ​There are large amounts of sodium (Na+)ions inside the cells.
C) ​The potassium (K+)and sodium (Na+)ions are in balance.

Quizplus · Accepted Answer

At rest, a neuron's membrane maintains a resting potential due to the uneven distribution of ions. There are indeed large amounts of potassium ions inside the cell compared to the outside. This is primarily due to the action of the sodium-potassium pump, which pumps two potassium ions into the cell for every three sodium ions it pumps out, contributing to the negative charge inside the cell relative to the outside.

When a Neuron Membrane Is "At Rest," Which of the Following