Question

The resting membrane potential results from

A) uneven distribution of ions across the cell membrane.
B) differences in membrane permeability to Na+ and K+.
C) activity of the sodium/potassium pump.
D) A and B
E) none of the above

Answer 1

The resting membrane potential is a result of the uneven distribution of ions across the cell membrane, which is caused by differences in membrane permeability to Na+ and K+ ions. The sodium/potassium pump also contributes to the resting membrane potential by maintaining the concentration gradients of Na+ and K+.

Step-by-step explanation:

The resting membrane potential is the result of uneven distribution of ions across the cell membrane. This uneven distribution occurs due to differences in the membrane permeability to Na+ and K+. The membrane is more permeable to K+ ions, allowing them to diffuse out of the cell and creating a negative charge on the inside.

The activity of the sodium/potassium pump also contributes to the resting membrane potential. The pump helps maintain the concentration gradients of Na+ and K+ by actively pumping Na+ out of the cell and K+ into the cell.