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brief electrical impulse that provides the basis for conduction of information along an axon
threshold of excitation
the value of the membrane potential that must be reached to produce an action potential
voltage dependent ion channel
an ion channel that opens or closes according to the value of the membrane potential
all or none law
principle that once an action potential is triggered, it transmits with full force to the end of the fiberout
passive conduction of electrical current, in a decremental fashion, down the length of an axon
conduction of action potentials by myelinated axons, appears to jump from one node of ranvier to another
membrane of terminal button lies next to postsynaptic membrane, through which NT is released
membrane located on the dendrite of a neuron receives info, concept of chemical transmission
alterations in the membrane potential of a postsynaptic neuron, produced by the liberation o fa neurotransmitter at the synapse
post synaptic receptor
receptor molecule in the postsynaptic membrane of a synapse that contains a binding site for a neurotransmitter
receptor that contains a binding site for a neurotransmitter and an ion channel that opens when a molecules of the neurotransmitter attaches to the binding site
receptor that contains a binding site for a neurotransmitter, activates an enzyme begins a series of events , opening an ion channel elsewhere in the membrane of the cell when a molecules of the neurotransmitter attaches to the binding site
a protein coupled to a metabotropic receptor; conveys messages to other molecules when a ligand binds with and activates the receptor
chemical produced when a g protein activates an enzyme; carries a signal that results in the opening of the ion channel or causes other events to occur in the cell
process inhibitory/excitatory postsynap. potentials control the rate of firing of a neuron
excitatory postsynaptic potential
EPSP excitatory depolarization of the postsynap. membrane of a synapse caused by the liberation of a NT by the terminal button
the reentry of a NT just freed by a terminal button back through its membrane, terminates the potential
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