The action potential changes the membrane potential from ______mV (resting) to ____mV and back again to the resting membrane potential?
Na+, k+, and voltage-gated
A change in membrane permeability first to ___then to ___due to the opening of what type of ion channel?
Where is the density of voltage-gated Na+ channels the greatest?
Dendrites and cell body
What areas of the neuron generate signals that open these voltage-gated channels?
Opening of these channels causes the membrane to ___(voltage change)
Threshold, action potential
If the membrane reaches the trigger point, known as _____what electrical potential will be generated?
During the depolarized phase, voltage-gated ____channels open and ____enters the cell?
Inactivtion of voltage-gated Na+ channels and Opening of voltage-gated K+ channels
What are the two processes that stop the potential from rising above +30 mV?
The opening of voltage-gated K+ channels cause the membrane to ____?
Out of the cell
Does K+ move into or out of the cell?
If the membrane potential becomes more negative than -70 mV, this is called ___?
This potential is caused by what characteristic of K+ permeability?
N+, absolute refractory
After an action potential, the neuron cannot generate another action potential because____channels are inactive. This period is called the ____period?
Relative refractory, more
During the ___period, the cell can generate another action potential but only if the membrane is____(more or less) depolarized.
Increased diameter and pressure of mylein
Conduction velocity along the axon is increased by what two characteristics?
Conduction along a myelinated axon is called_____conduction?
Name the disease whose symptoms include loss of vision and increasing muscle weakness?
Myelin sheaths of CNS axons/Low voltage-gated channels between the nodes of Raniver
What does Multiple sclerosis destroy? How does it stop action potential?
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.