In order to establish a membrane potential,the cytoplasmic fluid is ____ compared to the interstitial fluid
A) more positively charged
B) more negatively charged
C) hypertonic
D) hypotonic
E) none of these

Question

Quizplus · Accepted Answer

In order to establish a membrane potential, the cytoplasmic fluid must have a more negative charge compared to the interstitial fluid. This is achieved through the selective movement of ions across the cell membrane, mainly through the action of ion channels and transporters. The most important ions involved in establishing the membrane potential are potassium (K+) and sodium (Na+), with K+ being more abundant inside the cell and Na+ being more abundant outside the cell. As K+ leaks out of the cell through K+ channels, the interior of the cell becomes more negative compared to the exterior. This difference in charge is known as the resting membrane potential, which is typically around -70mV in most cells.

In Order to Establish a Membrane Potential,the Cytoplasmic Fluid Is