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Signals and messages
An action potential is an all or nothing response.
All or nothing response to the fact that the neurone either conducts an action potential
or it does not.
(ALL ACTION POTENTIALS ARE OF THE SAME MAGNITUDE +4OmV)

The roles of synapses in the nervous system
transmit a…

Page 2

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not all the neurone will send EPSPs to generate an impulse
some will send IPSPs which inhibit the production of an action potential
An IPSP can override incoming EPSP signals from adjacent neurones
Temporal summation
one neurone fires multiple impulses from the
same place
pauses in between will not be…

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