Nt1310 Unit 6 Assignment

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Pages: 2

1.A membrane potential is the electrical difference between the inside and out side of a cell. Change to the membrane potential triggers signals by action potential. Action potential is a signal that transmits information over spaces in the nervous system. A cell at rest is negatively charged inside with regard to the outside fluid, so a membrane potential is the reversal of this, so the inside becomes positively charged with regard to outside. In order to cause an action potential, depolarization of the cell should cross a key level called the threshold.
2.Sodium equilibrium potential doesn’t change during an action potential. Although it is easy to get the idea that sodium ions flood into the cell the amount that enters the cell in very small