BIOL 1107 Lecture Notes - Resting Potential, Enteric Nervous System, Nernst Equation
Document Summary
Define of membrane potential and be able to identify where neuronal membrane potential comes from. Define equilibrium potential, incorporating the nernst equation into your explanation. Be able to describe the changes in membrane potential that occur during an action potential using the terms depolarize, hyperpolarize, and refractory period. There is a cns and a pns. Regulates other organ systems (medulla in brain stem regulates respiration) Membrane potential is the result of an electrochemical gradient. (what"s that?) Large, negatively charged proteins inside the cell. Higher na+ outside than inside/higher k+ inside than outside: maintained by the sodium/potassium atpase pump potential . K+ leak channels constantly open (so open at rest), allowing k+ to diffuse out of the cell. Very few na+ channels are open at rest. Overall: the inside of the neuron is more negative than the. The distribution of ions inside and outside a neuron that produces the resting membrane.
