BIOS 484 Lecture Notes - Lecture 2: Resting Potential, Ion Channel, Sensory Neuron
15 Nov 2016
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Overview: how do the ideas of localization of function and aggregate field differ? functionally specialized regions in the brain that are domain specific for different cognitive processes(gall"s phrenology) According to the aggregate field view, all areas of the brain participate in every mental function. ( pigeon: what"s the neuron doctrine, and what organizational structure of the brain did it dispute, neuron doctrine v reticularism/syncytium. Why is this important: na+/k+ pump: sodium out, k+ in. Regulate cell"s resting potential by maintaining a larger concentration of k+ inside the cell and na+ outside the cell. ), what happens when they open/close: changes in membrane potential induced by the electrotonic currents generated by action, sensory receptor, and synaptic potentials alter the three-dimensional structure of the ion channel to permit certain ions to cross. Ipsp: excitatory (depolarizing the membrane, inhibitory (hyperpolarizing the membrane, neurotransmitter leading to postsynaptic potential. Directly coupled receptor undergoes structural change -> depol of post synaptic neuron(ion channel ) fast.
