PSL300H1 Study Guide - Final Guide: Cyclic Adenosine Monophosphate, Habituation, Neural Coding
7 Jan 2017
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Lecture 17 receptor potentials & adaptation; peripheral/central nervous system. Receptor potential: receptor protein, transmission of signal, adaptation, habituation. We(cid:859)(cid:448)e lea(cid:396)(cid:374)ed so fa(cid:396): rmp, how to generate ap, what an ap looks like, how to transmit ap along axon, what happens at axon terminal, release nt, what happens when post-synaptic neuron binds nt. Instead of looking at a neuron-to-neuron connection, where input comes from presynaptic neuron and post-synaptic neuron receives it; we remove pre-synaptic neuron, and look at receptor potential of the post-synaptic neuron (psp). But now the input is not coming from a pre-synaptic neuron releasing nt, but from the external environment in terms of energy (photons, sound waves, pressure, etc. Receiving the signal from the outside (sensory information) Receptor potential: change in the mp due to receipt of signal from exterior sensory cue. Energy from the environment will react with membrane proteins, and in general, cause depolarization. Depolarization of sensory receptors upon receipt of specific energy: exception: photoreceptors hyperpolarize.
