SPHR 2106 Lecture Notes - Lecture 10: Skeletal Muscle, Acetylcholine, Axon

• School: GWU
• Department: Speech and Hearing Science
• Course: SPHR 2106
• Professor: Schulz

Document Summary

Glial cell: create myelin in cell, protect nerve cells, cleanup cns waste. Electrical component: message transmission, ions go in and out of semipermeable membrane. Presynaptic neuron: makes synapses, synapses release neurotransmitters, if neurotransmitters are excitatory, generates action potential. Excitatory neurotransmitter released by postsynaptic neuron which allows gates to open allow more positive ions to flow in causes depolarization, excitatory postsynaptic potential. Depolarization: more positive inside compared to outside if neurotransmitters are positive. Terminal bouton: have vesicles containing neurotransmitter substance, released into synaptic cleft and next neuron. Allows channels to open and more positively ions to flow in. Inhibitory neuron transmitters: hyperpolarization, cause more negative ions into the cell (18:15) Resting potentials: when neurons are being a couch potato. When neuron receives excitatory neurotransmitter, open gate to let in positive ions, inside is more positive: depolarization and epsp. Inside of cell becomes more negative, harder to get to threshold. Inhibitory neuron transmitters: allows more negative ions in cell.