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PSIO 303 BLOCK 1 L12 QUESTIONS WITH 100% SOLVED SOLUTIONS
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An mGluR receptor on the postsynaptic cell membrane has a Go G-protein. If a neurotransmitter causes receptor activation and then Go causes a sodium channel to close, what influence is this action likely to have on membrane potential in the postsynaptic cell? Nn - A hyperpolarizing influence Wha...

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  • August 17, 2024
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  • 2024/2025
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PSIO 303 BLOCK 1 L12
An mGluR receptor on the postsynaptic cell membrane has a Go G-protein. If a neurotransmitter causes
receptor activation and then Go causes a sodium channel to close, what influence is this action likely to
have on membrane potential in the postsynaptic cell? Nn - A hyperpolarizing influence



What is a metabotropic receptor? - a type of membrane receptor of eukaryotic cells that acts
through a second messenger.



What is convergence of neural input ? - several presynaptic neurons synapse with one post
synaptic neuron (can be a mix of stimulatory and some inhibitory signals)



How does convergence of neural imput relate to size and polarity of graded potentials? - graded
potentials: side varies with strength of stimulus



What is an inotropic receptor? - membrane-bound receptor proteins that respond to ligand
binding by opening an ion channel and allowing ions to flow into the cell



Where do transporters move neurotransmitters from? - from the synaptic cleft back into the
presynaptic cell or nearby a glial cell



What is vGLUT and what does it do? - vesicular glutamate transporter - responsible for the uptake
of the excitatory amino acid, L-glutamate, into synaptic vesicles



What are neurotransmitters reuptake transporters? - process to recycle - reabsorption of a
neurotransmitter by a neurotransmitter transporter located along the plasma membrane of an axon
terminal



What driving force do glutamate transporters use? - sodium gradient and they accumulate back
into neuronal cells/glial cells



What do ionotropic receptors do? - ALWAYS cause excitation

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