PSYC 4034 : PSYC 4034 TEST 2
Document Summary
From threshold of excitation til depolarization is. No amount of stimulation will make it generate an. Membrane is incapable of generating a new ap at this time bc of the ion imbalance going on (sodium-potassium imbalance: relative refractory period. From the time repolarization is 1/3 complete to the threshold value after the ap. It can respond with an ap if the stimulus is above normal. By the time the ap is reaching the next node, the previous node is out of it"s refractory period and is able to produce a new ap but it doesn"t. These sections of myelin are 1mm wide and if you made them half as long, conduction would decrease. If it was completely myelin, the signal would never even get there bc the myelin wouldn"t allow it to depolarize and regenerate the signal/access the voltage-dependent gates to conduct the flow. O: conduction in the correct path from cell body to tb.
