PSYO 1011 Lecture Notes - Lecture 5: Motor Neuron, Electric Potential, Membrane Potential

• School: Dalhousie University
• Department: Psychology
• Course: PSYO 1011
• Professor: Leanne Stevens,Shelley Adamo,Kevin Duffy,Jennifer Stamp

Document Summary

Every action we make is made by the nervous system. Made of billions of cells called neurons. Every neutron as an input, transit and output section. Enormous network of cells all interconnected and communicate simultaneously (not a line of communication) Electrical force: like charges repel, opposites attract (ions of di erent charge attract, most nerve cells have a resting membrane potential of -70mv (minus because the inside of the neuron is more negative than outside) Positive ions will be attracted inside and negative ions will be attracted outside the neuron. Direction will be di erent for every ion. : molecules tend to move from high concentration to low concentration, ions want concentration to be the same everywhere, ex: lots of potassium inside the cell will want to leave the cell where there is little potassium. Thursday, september 13, 2018 concentration: sodium/potassium pump. Selectively moves potassium inside the cell and pumps sodium outside the cell.