PSYC 2000 Chapter : PSYCH EXAM 4
Document Summary
Electrical: know your neuron: neuron structure: dendrite, soma, axon, myelin sheath, terminal, synapse, see diagram of neuron. Neuronal communication: electrochemical: at rest, the inside of the neuron has a negative charge compared to the outside, charge originates at the dendrite, and causes channels to open and flood the cell with positively charged ions. The change of balance to a net positive is an electrical potential: a channel opening causes a chain reaction, where the next channel opens and floods the cell with positively charged ions. When the signal reaches a certain threshold, it is called an action potential (electrical potential): when the action potential is over, the cannels close and the. Refractory period, during which electrical potential is less likely: a neuron requires a certain threshold to maintain its charge down the axon. Thus, a neuron is either at action potential or it is not: all or none.
