PSY 260 Lecture Notes - Lecture 4: Axon Terminal, Raphe Nuclei, List Of Thalamic Nuclei
Document Summary
Exogenous substance: brought into the body from outside: used to try to change functioning in body or brain, affect chemical communication that is endogenous. Endogenous substance: substance created inside the body: neurons take electrical signals and turn them into chemical transmitters known as neurotransmitters, used to communicate. Reuptake occurs: transporters take molecules of neurotransmitters back to the neuron that released them to be reabsorbed. Receptor proteins: key and lock responses. Ionotropic receptors (ligand-gated ion channel s/o bio 203: when bound with neurotransmitters, ion gate opens and ions can ow into or out of the postsynaptic neuron, the ow changes the potential of the neuron. Excitatory effect: depolarization, brings closer to the threshold, and will likely produce an action potential. Inhibitory effect: hyperpolarization, draws away from threshold, and is far less likely to produce an action potential. Metabotropic receptors: linked across the cell membrane.
