Show:
So Much Potential!
I-I-Ions
Brrr, Polarize Me!
Neuron Nerd
Terms to Know!
100
Ion channels allow only some molecules to pass through the membrane.
What is Selective Permeability
100
Positive, found mostly outside of the cell.
What is Sodium
100
Meaning "opposite voltage"
What is Polarize
100
The little branches on one end of a Neuron
What are Dendrites
100
Minimum voltage required for an Action Potential to fire (-55 to -50 mV)
What is Threshold
200
This causes high to low concentration diffusion of molecules across the membrane.
What is concentration gradient
200
Positive, found mostly inside the cell.
What is Potassium
200
Meaning "more positive" usually about +40 mV
What is Depolarize
200
Where Action Potentials are propogated
What is the Axon Hillock
200
Action potential either fires or it doesn’t
What is the All or Nothing Phenomena
300
Because of this, ions move from high charge areas to low charge areas.
What is Voltage Gradient
300
During the Rising Phase, there is an influx of...
What is Sodium
300
Meaning "more negative" usually about -90 mV
What is Hyperpolarize
300
Pathway for the Action Potential
What is the Axon
300
Starts in the Axon Hillock
What is the Propagation of the Action Potential
400
About -55 to -50 mV, setting off an Action Potential.
What is Threshold
400
During the Falling Phase there is an efflux of...
What is Potassium
400
Meaning "returning to the original charge"
What is Repolarize
400
Dips between areas of myelinated axons
What are the Nodes of Ranvier
400
Can’t fire another AP (-55 to 0)
What is the Absolute Refractory Period
500
These type of axons allow for faster Action Potentials.
What is Myelinated
500
The ratio of Sodium to Potassium in regards to the Sodium/Potassium Pump
What is 3 Na vs. 2 K
500
Happens briefly during the Falling Phase
What is Hyperpolarize
500
End of the Neuron, opposite the Dendrites
What is the Synaptic Cleft
500
Can fire another AP if stimulus is strong (-70 to -90)
What is the Relative Refractory Period