Question

The membrane potential in which there is no net movement of the ion across the membrane is called the _______. A. graded potential B. threshold potential C. equilibrium potential D. action potential

Answer 1

The membrane potential in which there is no net movement of the ion across the membrane is called the C. equilibrium potential.

Membrane potential can be described as the different electrical potential that is present inside and outside of a cell due to the sodium-potassium pump. A cell tends to have more potassium ions inside it as compared to the outside. On the other hand, the concentration of sodium ions in a cell is kept lower as compared to the outer environment.

Sodium being a negative ion and potassium being a positive ion creates differences in the electrical potential inside and outside of a cell.

An equilibrium potential is a point where there is no net movement of ions across the membrane because the electric force is equal inside and outside of a cell. The opposing forces are balanced which makes no movement of ions possible.

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