strength of action potential Flashcards
what happens to the sodium ions once an action potential is triggeed
it diffuses sideways causing the sodium ions channels in the next reigion to open wave of depolarisation
what is propagation what happens when an action potential has been initaited
moves rapidly down along the axon
what does it do to the membrane
reverse its charges .
as one axon region becomes depolarised what does it act as
a stimulant for the next axon reigion to depolarise
what dont action potential do
lose energy as it moves along the axon
how is the speed of the action potential varied
due to temperature, size of the axon and the myelination
what is myelination
axon membrane insualated with schwan cells
what are found in the knodes of ranver
sodium ions and ion channels
where can action potetnial occur
only at the knodes of ranvier where there are na ion channels
why is the action potential travel faster with myelination
the action potential can effectively jumo from knode to knode satatory conduction
what happens as the diameter of the axon membrane increase
less resistance so the ion can travel faster and increase the speed of depolarisation across the axon
how does temperature affect the axon membrane
the ions diffuse faster and the kinetic energy increase for the enzymes required for atp to drive the sodium and potassium punp
