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How do you calculate the number of ions entering the axon during the action potential?
Rhunter961
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How do you calculate the number of ions entering the axon during the action potential per meter of non mylinated axon length?
The charge is 1.6E-19 per coulomb. 1 mole/liter=6.02E20 (particles( ions, atoms, ect)/cm^3)
What happens in the neurolemma as the result of an action potential?
It provides insulation to the axons and dendrites during depolarization or action potential.
What is the interval called during which a neuron is dormant after an action potential has been completed?
Resting potential
Is the Nernst potential of Sodium achieved during the action potential?
the Nernst potential of Sodium is +60mV. most action potentials do not reach +60mV at peak depoloarization. http://openwetware.org/images/thumb/a/a6/Action-potential.jpg/300px-Action-potential.jpg.png
What changes occur in the neuron during an action potential?
Resting Potential: the potential remains sameAction Potential: potential causes the opening of voltage-gated sodium channels
Which is the first step in a neuron production of an action potential?
Depolarization is the first event in action potential. During depolarization, the sodium gates open and the membrane depolarizes.
What ion causes re polarization of the neuron during an action potential?
K+
During depolarization of action potential the outer part of axon becomes?
Negative
Why does the polarity of a cell membrane reverse during an action potential?
During an action potential the neuron receives a stimulus causing the cell membrane to become more permeable to sodium than potassium, calling the polarity to change.
Period of reploarization of the neuron during which it cannot respond to a second stimulus?
The absolute refractory period. This period occurs after the action potential has been initiated and is a result of inactivation of the sodium channels. These sodium channels would normally open up to allow sodium influx into the cell during an action potential. The absolute refractory period occurs during an ongoing action potential and is the period in which a subsequent action potential absolutely cannot be generated.This should not be confused with the relative refractory period which occurs immediately following the absolute refractory period (during membrane hyperpolarization). During this period a subsequent action potential is possible, but more difficult to attain.
Why is an action potential is self-regenerating?
The Na+ diffusing into the axon during the first phase of the action potential creates a depolarizing current that brings the next segment, or node, of the axon to threshold.
Why is an action potential self-regenerating?
The Na+ diffusing into the axon during the first phase of the action potential creates a depolarizing current that brings the next segment, or node, of the axon to threshold.
