PSYC 106 Lecture Notes - Lecture 3: Neuromuscular Junction, Ligand-Gated Ion Channel, Choline
Document Summary
Action potential jumps from ion channel to ion channel at the nodes of ranvier. Acetylcholine: acetate + choline, choline from diet, acetate from metabolism, used at the neuromuscular junction. Monoamines: composed from amino acids aka precursors of this are amino acids, look at the slides. Gaba is a neuron inhibitor, makes it harder to have an action potential. An inhibitory neurotransmitter usually works on the potassium channels. Glutamate: works on receptors of the na channel, and excitatory neurotransmitter. Peptide: two or more amino acids, ex are endorphins and substance p. If you use them up, it can take a while to make more of them. A day in the life of a nuerotransmitter is a great picture, memorize the process. Altered by enzymes in the synapse to be inactive. Nt will float away eventually, and gets absorbed by glial cells. Neurotransmitter on sodium channels depolarizes cells, and if it opens. Two types of ways a nt can effect a receptor:
