The effects of demyelination?
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Degeneration of ogliodendrocytes, neural communication loss, axonal
degeneration and loss
What do action potentials do to the inside of a neuron cell?
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Make it more positive
What happens when an action potential arrives at the axon terminal?
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1. voltage change allowsion channel membranes to open
2. calcium flows in and binds to synaptic vesicles
3. vesicles fuse with the cell membrane at axon terminal
4. empty contents into synaptic cleft
5. Pieces of axon terminals membrane cycle back into the soma as new
vesicles that are filled with neurotrasnmitters
saltory conduction
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Conduction of action potential. Depolarise this area of the membrane until
it reaches threshold potential.
Action potentials are not degradable
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, reproduced periodically as it travels down the axon. Plays into the all or
none effect, where you get an actional potenital, or you get none
What happens when you reach the spike threshold?
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Triggers an action potential
How do neurons communicate?
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ions
Sodium conductance remains
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inactivated. causes refractory period
Why are reactive astroyctes dangerous?
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Degeneration of ogliodendrocytes, neural communication loss, axonal
degeneration and loss
What do action potentials do to the inside of a neuron cell?
,Give this one a try later!
Make it more positive
What happens when an action potential arrives at the axon terminal?
Give this one a try later!
1. voltage change allowsion channel membranes to open
2. calcium flows in and binds to synaptic vesicles
3. vesicles fuse with the cell membrane at axon terminal
4. empty contents into synaptic cleft
5. Pieces of axon terminals membrane cycle back into the soma as new
vesicles that are filled with neurotrasnmitters
saltory conduction
Give this one a try later!
Conduction of action potential. Depolarise this area of the membrane until
it reaches threshold potential.
Action potentials are not degradable
Give this one a try later!
, reproduced periodically as it travels down the axon. Plays into the all or
none effect, where you get an actional potenital, or you get none
What happens when you reach the spike threshold?
Give this one a try later!
Triggers an action potential
How do neurons communicate?
Give this one a try later!
ions
Sodium conductance remains
Give this one a try later!
inactivated. causes refractory period
Why are reactive astroyctes dangerous?
Give this one a try later!
