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11 years ago
Voltage-gated Na+ and K+ channels are found only in membranes that propagate action potentials. Membranes found in a chemical synapse that propagate action potentials are the membrane of the synaptic terminal, including the presynaptic membrane, and the membrane of the axon hillock (and axon) of the postsynaptic neuron.
Voltage-gated Ca2+ channels, which help regulate the release of neurotransmitter from the presynaptic neuron, are found only in the presynaptic membrane. Ligand-gated ion channels, which open in response to neurotransmitter in the synaptic cleft, are found only in the postsynaptic membrane.
Finally, there are no gated ion channels in the plasma membrane of the cell body of the postsynaptic cell. For this reason, postsynaptic potentials are not propagated along the membrane of the postsynaptic cell in the same way that an action potential is propagated along a membrane containing voltage-gated Na+ and K+ channels.
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Answer accepted by topic starter
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Posts: 4
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11 years ago
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Evlskier77, Patts20, emmn, dindin1707, macguru101, Moanas, daltonpils, mddprs, karrikalyani, Sid69, jsorn, jennamyles, juki, snabhan, scostello, dertas, Dr.Cox, monique.garcia9, tascha78, irulers, arinelletiandra, ASHLINGOCARROLL, cmk13c, saf, vickyhurlburt, Anneru, capri90, sophigabi12, m.elzeftawy, Govmaster, cvnzdsASGHSL;, celir, cptflapjack, sue_sue, padre, bio_man, kittyxteddybear, mishymishy, pascalbui89, Olympusxa123, biostudent00, NikkoR, beuniqueeeee, jusmebro, teepham16
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11 years ago
There are no gated ions channels in the plasma membrane!
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11 years ago
Always remember that the Na can only create an action potential once it reaches the axon hillock!
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11 years ago
Thanks for this!
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mich289
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10 years ago
Remember, postsynaptic potentials are not propagated along the membrane of the postsynaptic cell because there are no gated ion channels in the plasma membrane of the cell body of the postsynaptic cell.
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10 years ago
This is exactly what I needed, thanks so much for the help!
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10 years ago
What is the difference between synaptic, pre synaptic and post synaptic cells?
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10 years ago
pre synaptic Where the neurotransmitter is released. post synaptic cells? This is where the neurotransmitters bind and subsequently initiate an action potential.
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moekohunter
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10 years ago
It's important to point out that postsynaptic potentials are not propagated along the membrane of the postsynaptic cell since there are no ion channels in the plasma membrane of the cell body of the postsynaptic cell.
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9 years ago
So, Because the ATP production is created by the ETC, you have considered that in your answer
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