In a resting potential, an example of a cation that is more abundant as a solute inside a neuron than it is in the interstitial fluid outside the neuron is ________.
A) HCO3−
B) Cl−
C) Ca++
D) Na+
E) K+

Question

Quizplus · Accepted Answer

The correct answer is K+. At rest, neurons have a higher concentration of K+ inside the cell compared to outside, resulting in a negative resting membrane potential. This resting potential is essential for the neuron's ability to generate and propagate electrical signals. Choices A, B, C, and D are all anions or cations that are typically in lower concentrations inside the neuron compared to outside.

In a Resting Potential, an Example of a Cation That