Question

Which of the following is FALSE about the resting membrane potential?

A) All cells have a RMP.

B) K⁺ concentration is higher inside the cell than outside the cell.

C) Fixed cations produce a more positive charge inside.

D) The sodium-potassium (Na⁺/K⁺) pump helps to create the charge difference.

Answer 1

ANSWER :

Almost living cells of the body have a specific resting membrane potential (RMP) which generally remains between the -70 to -90 mV. The resting potential is caused due to concentration difference between the potassium and sodium ions present inside and outside of the cells (Na+/K+ pump helps to create charge difference). During RMP, there are more sodium ions present outside in extracellular matrix than the number of potassium ions inside cells, that cause the generation of negative charge along the cell membrane. Hence option (C) is the correct answer choice.