PSYC 2240 Lecture 3: September 20

• School: York University
• Department: Psychology
• Course: PSYC 2240
• Professor: J De Souza

Document Summary

September 20, 2018: negative feedback loops are important to stop the signaling, otherwise we would have epileptic seizures all the time, pharmacological agents have side effects. They try to target one neuron, but they will also affect other neurons and other organs: you use energy to create something, that if you trigger it, it happens really quick. If you put the neuron in saline outside of the body, you"re trying to measure the membrane potentials using the micro electrodes. If you take the electrodes out (or if the neuron dies), the potential will jump to zero. The more hyperpolarizing current you put in, you"ll never reach the threshold. When we change how the stimulator is putting the current in. We get depolarization as we increase the stimulation, until you reach an action potential sodium ions rush in: ap: one of the neurons is now communicating with the next one, through the neurotransmitters.