Depolarization of a cell membrane occurs due to the following steps:

1. At resting potential, the inside of the neuron is negatively charged compared to the outside. This is due to the distribution of ions, with more sodium ions (Na+) outside the cell and more potassium ions (K+) inside the cell.

2. When a stimulus is received, voltage-gated sodium channels open. This allows Na+ to rush into the cell, following its concentration gradient.

3. The influx of positive Na+ ions makes the inside of the cell more positive, reducing the difference in charge between the inside and outside of the cell. This is the process of depolarization.

4. If the depolarization reaches a certain threshold, it triggers an action potential. This is an electrical signal that travels down the neuron, leading to the release of neurotransmitters.

5. After the action potential, the cell repolarizes. The sodium channels close and potassium channels open, allowing K+ to leave the cell. This restores the negative charge inside the cell, returning it to its resting state.

6. The sodium-potassium pump then actively transports Na+ and K+ ions against their concentration gradients to maintain the resting potential. This requires energy in the form of ATP.

Question

Depolarization of a cell membrane occurs due to the following steps:

1. At resting potential, the inside of the neuron is negatively charged compared to the outside. This is due to the distribution of ions, with more sodium ions (Na+) outside the cell and more potassium ions (K+) inside the cell.

2. When a stimulus is received, voltage-gated sodium channels open. This allows Na+ to rush into the cell, following its concentration gradient.

3. The influx of positive Na+ ions makes the inside of the cell more positive, reducing the difference in charge between the inside and outside of the cell. This is the process of depolarization.

4. If the depolarization reaches a certain threshold, it triggers an action potential. This is an electrical signal that travels down the neuron, leading to the release of neurotransmitters.

5. After the action potential, the cell repolarizes. The sodium channels close and potassium channels open, allowing K+ to leave the cell. This restores the negative charge inside the cell, returning it to its resting state.

6. The sodium-potassium pump then actively transports Na+ and K+ ions against their concentration gradients to maintain the resting potential. This requires energy in the form of ATP.

Knowee AI · Accepted Answer

Depolarization of a cell membrane occurs due to the following steps:

1. At resting potential, the inside of the neuron is negatively charged compared to the outside. This is due to the distribution of ions, with more sodium ions (Na+) outside the cell and more potassium ions (K+) inside the cell.

2. When a stimulus is received, voltage-gated sodium channels open. This allows Na+ to rush into the cell, following its concentration gradient.

3. The influx of positive Na+ ions makes the inside of the cell more positive, reducing the difference in charge between the inside and outside of the cell. This is the process of depolarization.

4. If the depolarization reaches a certain threshold, it triggers an action potential. This is an electrical signal that travels down the neuron, leading to the release of neurotransmitters.

5. After the action potential, the cell repolarizes. The sodium channels close and potassium channels open, allowing K+ to leave the cell. This restores the negative charge inside the cell, returning it to its resting state.

6. The sodium-potassium pump then actively transports Na+ and K+ ions against their concentration gradients to maintain the resting potential. This requires energy in the form of ATP.

Depolarization of a cell membrane occurs because

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