PSYC 1001 Lecture Notes - Lecture 4: Barbiturate, Synaptic Pruning, Ethanol

• School: Carleton University
• Department: Psychology
• Course: PSYC 1001
• Professor: Chris Motz

Document Summary

Brain controls behaviour, processes information and regulates body processes. Insulation for axon: made of fatty proteins, produced by glial cells, used to protect message. Increase speed of messages: terminal buttons, transmitter substance (neurotransmitters, located on end of axons, connects dendrites and axons, synapse, junction where info is transmitted. Between the terminal button of a presynaptic neuron and a postsynaptic neuro. Excitartory potential more likely to fire/dec. neg. Inhibitory potential less likely to fire/ increase neg. The neural impulse: complex electrochemical reaction, fluid in and out of neurons and filled with ions. Ions = electrically charged molecules: cell members are semipermeable (sodium, potassium & chloride, resting potential stable negative charge when inactive. Abrupt short-lived reversal in charge (brief shift in the charge that runs along an axon) Unequal distribution of negative and positive charged ions. Ion channels and ion transporters regulate the number of ions inside and outside the axon. Relative refractory period cell can fire with increased stimulation.