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If it is sufficiently depolarized it will fire an action potential A depolarized neuron will successfully pass a message. If you have a polarized neuron will not be able to feel a burn, etc.
Wiki User
∙ 15y ago
Wiki User
∙ 9y agoStimulus A will depolarize a neuron just barely above the threshold. Stimulus B depolarizes a neuron to 10 mV beyond the threshold.
Wiki User
∙ 10y agoWhen this occurs, the membranes potenial drops, as potassium and sodium diffuse with their gradient.
Wiki User
∙ 11y agosome sodium channels open
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The resting membrane potential in neurons ranges from?
-60mV to -70mV
What is the inside charge of a nerve at its resting potentail?
Neurons have a resting membrane potential of approximately -70mV. Muscle cells have a resting membrane potential of approximately -90mV.
What characterize repolarization the second phase of the action potential?
Once the membrane depolarizes to a peak value of +30 mV, it repolarizes to its negative resting value of -70 mV.
What characterizes repolarization the second phase of the action potential?
Once the membrane depolarizes to a peak value of +30 mV, it repolarizes to its negative resting value of -70 mV.
What happens when a neuron becomes excitable?
A neuron which is excitable is in its RESTING STATE, which means that it is POLARIZED, and thus able to be stimulated into an action potential.
The resting membrane potential in neurons ranges from?
-60mV to -70mV
What is the inside charge of a nerve at its resting potentail?
Neurons have a resting membrane potential of approximately -70mV. Muscle cells have a resting membrane potential of approximately -90mV.
Does the sodium or potassium pump provide energy for neurons but does not affect resting membrane potential?
False
What characterize repolarization the second phase of the action potential?
Once the membrane depolarizes to a peak value of +30 mV, it repolarizes to its negative resting value of -70 mV.
What characterizes repolarization the second phase of the action potential?
Once the membrane depolarizes to a peak value of +30 mV, it repolarizes to its negative resting value of -70 mV.
If a resting potential becomes more negative what happens to the cell?
When the membrane potential becomes more negative it is being hyperpolarized. Remember the resting membrane potential is already at a negative state (~70mV). So if you are making a comparison of a membrane potential that is hyperpolarized in comparison to a resting membrane potential, the resting membrane potential is said to be more depolarized.When the membrane potential becomes more positive it is called depolarization.
What happens when a neuron becomes excitable?
A neuron which is excitable is in its RESTING STATE, which means that it is POLARIZED, and thus able to be stimulated into an action potential.
What would happen to a resting membrane potential if the sodium potassium transport pump was blocked?
During depolarization, sodium (Na) rushes into the neuron through Na channels (at the Nodes of Ranvier between the bundles of myelin "insulation"). Less Na in the extracellular fluid would mean there would be less to rush in. So, the neuron would not be depolarized as well. The resting membrane potential would be more positive on the inside.
What is the charge on the inside membrane during the resting membrane potential?
The resting membrane potential of a typical neuron is around -65mV
What happens if the permeability of a resting axon to sodium ion increases?
inward movement of sodium will increase and the membrane will depolarize.
What does the difference in the K and Na concentration on either side of the plasma membrane and permeability of the membrane to those ions generate?
resting membrane potential
What about a cell's resting membrane potential is FALSE?
The resting membrane potential is maintained by solely by passive transport processes.
