PSYB65H3 Chapter Notes - Chapter 2: Glossopharyngeal Nerve, Putamen, Area Postrema
Document Summary
Communication within neuron = electrical, communication between neurons = chemical. Axodendritic: axons that form synapses with dendritic spines. Axosomatic: axons forming synapses with the soma of the neurons. Dendrodendritic synapses: dendrites form synapses with other dednrites. Axoaxonic synpases: axons for synapses with other axons. Terminal button of axon contains small packages of neurotransmitters (vesicles) located next to active zones )protein accumulation on membrane that allow vesicle to deposite its contents into synapse) 2 types of receptors in postsynaptic membrane: transmitter-gated ion channels/ionotropic: control ion channel. When neutrotransmitter binds here it either opens or closes and changes ionic concentrations. Often in situations with fast response function depends on ion. If receptor controls channel permeable to na+ then it will depolarize dendrite (excitatory postsynaptic potential epsp). If receptor controls channel permeable to chloride, it would hyper polarize dendrite (inhibitory postsynaptic potential ipsp) G-protein-coupled receptors/ metabotropic: slower, more diverse responses.
