NROS 307 Study Guide - Midterm Guide: Resting Potential, Nernst Equation, Electrical Reactance

• School: University of Arizona
• Department: Neuroscience
• Course: NROS 307
• Professor: Alan Nighorn

Document Summary

Potential difference that allows one to do electrical work. Energy required to move one coulomb a distance of one meter against a force of a newton. The direction of current is the direction of flow of positive charge. Nerve and muscle cells carry both positive and negative ions in solution i. Measurement of how hard/easy ions can move through membrane channels. Object through which electrical charge can flow c. In essence, it"s the number of ion channels open. I = 1/s; where i is measured in ohms and s is siemens (unit measure of conductance. ii. b. c. d. Measured by how many ions go through the membrane (how hard/easy is it for ions to cross membrane) Difference between a series and parallel circuit? a. Current has multiple pathways, but only one voltage in common. The more resistors (ion channels open) --> the lower the resistance --> higher conductance.