The Membrane Potential Between Outside And The Inside Cell Membrane Polarity

924 WordsJul 21, 20164 Pages
Option 2: The resting membrane potential is the difference between the outside and the inside cell membrane polarity. It is called a resting potential because it occurs when a membrane is not being stimulated or conducting impulses (Ritchison n.d.). This polarity can be measured and it is about -70mv. In the resting membrane potential, outside the cell has a more positive polarity and inside the cell has more negative polarity. There are more Na+ and Cl- on the outside and larger negative proteins (because they cannot go through the tiny pores to outside) and more K+ inside the cell (Ceballos, 2016). Diffusion, electrostatic pressure, and sodium-potassium pump are the main forces affecting the resting membrane potential. Diffusion and electrostatic pressure work against the resting membrane potential and sodium-potassium pump help the resting potential. Diffusion occurs if there is a concentration gradient present and the molecules move from the higher concentration to the lower concentration. Electrostatic pressure work as simple as a magnetic effect, which is characterized by the opposite attraction of. Sodium-Potassium pump is an active mechanism and need energy (by food etc.) to work. In this case, 3 Na+ ions are excluded to the outside of the cell and 2 K+ ions brought into to the cell. This energy supply occurs through food we eat and they break ATP (Adenosine Triphosphate) to ADP (Adenosine Diphosphate). In action potential, only axon depolarization occurs, not to

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