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At rest, a neuron is highly polarized -- a significant electrical charge difference exists between the inside and the outside (poles) of the cell. This polarity is what allows the cell to quickly respond to triggering events and do work, similar to the charge in a battery. A neuron de-polarizes when something reduces that charge difference, typically when pores in the cell membrane are unblocked, allowing charged ions to flow. Technically, a reduction of even a single electron of polar charge is a "depolarization". This can occur by dozens of mechanisms. However, the usual process is: (1) a neuron is polarized, (2) an electrical signal traveling inside the neuron changes the internal membrane charge just enough to cause voltage-sensitive pores to open, which (3) allows a massive influx of charged ions from outside the cell. This now depolarized cell recovers its resting polarity quickly through a reverse flow of electrons and via ion pumps in the membrane.
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What event follows after the depolarization of a neuron?
A rapid return to the neuron's resting state
State in which the resting potential is reversed as sodium ions rush into the neuron?
Depolarization
How does the sodium potassium pump help with your homeostasis?
When a nerve cell (neuron) or muscle cell react, they do so by a process called depolarization. Before depolarization, the inside of the cell is slightly negative and the outside is slightly positive. During depolarization, sodium ions rush into the cell while potassium channels leak out. This reverses the original polarization and now the cell is said to be depolarized. The sodium/potassium pump helps reverse this back to its original polarized state so the cell can react again.
If the inside of the neuron is negatively charged compared to the outside the neuron is in the?
If it's approximately -70 mV, then it's in a resting state.
What do you call the state of a neuron when it is not firing a neural impulse?
Resting potential.
What event follows after the depolarization of a neuron?
A rapid return to the neuron's resting state
State in which the resting potential is reversed as sodium ions rush into the neuron?
Depolarization
Is depolarization the resting state of the p wave?
Yes.
How does the sodium potassium pump help with your homeostasis?
When a nerve cell (neuron) or muscle cell react, they do so by a process called depolarization. Before depolarization, the inside of the cell is slightly negative and the outside is slightly positive. During depolarization, sodium ions rush into the cell while potassium channels leak out. This reverses the original polarization and now the cell is said to be depolarized. The sodium/potassium pump helps reverse this back to its original polarized state so the cell can react again.
When the cardiac cells are in resting and negatively charged state this is known as?
Depolarization
What is the Difference between a receptor and an action potential?
action potential has a threshold stimulus and depolarization is just change in membrae potential where inside becomes for positive relative to outside. The AP has the ability to actually transmit info over long distance in axons once threshhold stimulus/depolarization is reached
If the inside of the neuron is negatively charged compared to the outside the neuron is in the?
If it's approximately -70 mV, then it's in a resting state.
Describe the action of depolarization and repolarization?
Depolarization is due to the influx of Na+ which causes the cell's internal membrane to become more positive, leading to an action potential. Repolarization occurs when K+ leaves the cell causing the interior of the cell to become negative again.
The state of the neuron when not firing a neural impulse is known as?
Resting potential
What do you call the state of a neuron when it is firing a neural impulse?
Resting potential.
What do you call the state of a neuron when it is not firing a neural impulse?
Resting potential.
State of an unstimulated neuron's membrane?
Polarized
