Lecture 4 1-14-08

Lecture 4 1-14-08 - I. Generator Potentials (GPo) (aka...

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I. Generator Potentials (GPo) (aka “receptor potentials”) (Figure 49.2) - In sensory neurons - Transducer physical stimuli e.g. crayfish stretch receptor - Amount of change in the GP is proportional to the amount of stretch in the muscle fiber - The information of the intensity of the physical stimulus is encoded on the frequency of the APs II. Chemical Synapse a. Presynaptic Nerve terminal i. Axon coming down that makes a synapse on a cell ii. Membrane bags called ‘synaptic vesicles’ (SV) contain a chemical called neurotransmitter(NT) b. Post synaptic neuron i. Concentration of membrane proteins called NT receptors c. Synaptic Transmission (Figure 48.17) i. AP in the presynaptic terminal induce the release of NT from the presynaptic side ii. NTs diffuse to the postsynatpic side and bind to and activate the NT receptors iii. When the receptors are activated turn out to the ion channels. Therefore when opened they will allow ions to flow. The ion flux is what produced the PSP
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This note was uploaded on 02/25/2010 for the course BILD BILD 2 taught by Professor Schroeder during the Spring '08 term at UCSD.

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Lecture 4 1-14-08 - I. Generator Potentials (GPo) (aka...

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