Postsynaptic potentials and synaptic integration & Integration and modification of synaptic events Flashcards
How are chemical synapses graded?
by the amount of neurotransmitter released not the amount of voltage
Chemical synapses can be what 2 things depending on how the neuron after the synapse is affected.
excitatory
inhibitory
Chemical synapses can be either excitatory or inhibitory depending upon what?
how the neuron after the synapse is affected
What does EPSP stand for?
excitatory post synaptic potential
If an ion channel opens it results in a graded depolarization. If the depolarization is great enough it results in an action potential.
EPSP- excitatory post synaptic potential
In EPSP if an ion channel opens what does it result in?
graded depolarization
In EPSP if the depolarization is great enough what results?
an action potential
What does IPSP stand for?
inhibitory post synaptic potential
If the binding of neurotransmitter results in hyperpolarization (usually due to chloride ions flowing in or potassium flowing out)
IPSP
In IPSP what does the binding of neurotransmitter result in?
hyperpolarization
How can excitatory synapses increase the activity of the postsynaptic neuron?
add together
summate
When multiple waves of neurotransmitter are released by one or more presynaptic neurons very quickly but at seperate times. Multiple EPSPs add up to increase the possibility of an action potential
temporal summation
In temporal summation what add up to increase the possibility of an action potential?
multiple EPSPs
multiple presynaptic neurons or multiple axon terminals of the same neuron are releasing large amounts of neurotransmitter at the same time which results in summation and potentially an action potential.
spatial summation
