Diffusion occurs because of the movement of molecules from the region of higher concentration to the region of lower concentration. This movement of molecules occurs due to a thermal motion. Diffusion normally occurs between two compartments having difference in concentration. In case of fluid it moves from the region of higher concentration to the region of concentration until a balance is reached. The process of diffusion is very important for the humans as well. The oxygen that humans breathe in gets diffused with the blood.<span> </span>
The process that could move sodium out of the cell is the active transport.
Explanation;
-Active transport involves the movement of particles or molecules across a membrane against a concentration gradient (from a region of their lower concentration to a region of their higher concentration).
-The mechanism of active transport requires the use of the cell's energy, usually in the form of adenosine triphosphate (ATP).
In order for an impulse to cross the synaptic gap between
the neurons, the impulse must be converted into a chemical signal as this will
allow it to exert effects and to be able to travel in distances such as having
to cross the synaptic gap between the neurons.