edit on 12/5/2012 by staple because: (no reason given)
Originally posted by Dispo
reply to post by new_here
The old advice about eating a banana to stave off cramp is exactly the same as drinking some salt water. Muscle and nerve cells in the body work through small and frequent impulses (electrical charge movement) which causes a cell to do whatever it's supposed to do, in the case of muscle cells, this function is contraction.
Each individual impulse passing a cell is called an action potential. An action potential works like this:
- Cell is happily sitting with -60mV potential
- Sodium ions (salt - Na+) start to pass in to the cell through Na+ channels while potassium ions (banana - K+) stop moving out of the cell. This increases the potential of the cell.
- At -40mV, calcium ions (Ca2+) start to move in to the cell through the calcium channels in the cell membrane.
- At +10mV the cell has reached its peak potential and begins to repolarise. Basically the opposite happens, K+ leaves the cell, Ca2+ ions are actively transported out of the cell. The potential begins to decrease again.
- At around -30mV the Na+ and K+ pumps swap their activity levels, this means that K+ begins to re-enter the cell while Na+ leaves to restore the original balance of ions either side of the membrane and leave the cell at -60mV.
Originally posted by pryingopen3rdeye
reply to post by NarcolepticBuddha
interesting factiod (cant find the link where i read it) when a patient experiences a reaction to a placebo they have proven that the patients body has actualy manifested the chemical/nutrient neccessary for the effect they experienced,