If the extracellular fluid around a neuron is replaced with an isotonic saline solution that contains K⁺ and other solutes at concentrations very close to the extracellular fluid concentrations of a normal cell, the result is

A) no resting membrane potential.
B) hyperpolarized membrane.
C) depolarized membrane.
D) a resting membrane potential close to its normal value.
E) None of the choices are correct.

Isotonic Saline

A solution of sodium chloride (salt) in water at a concentration that matches the salt concentration of the body cells and blood, commonly used for medical hydration and wound cleaning.

Extracellular Fluid

The body fluid outside cells, providing a medium for substances to pass between cells and blood vessels.

Resting Membrane Potential

The electrical charge difference across the cellular membrane when a neuron or muscle cell is at rest, typically around -70 mV.