Question

put the steps into the correct order to trace a nerve impulse.
1 if the neuron reaches its threshold level all gates open, allowing complete depolarization of the cell and creating an action potential.
2 after the impulse travels through the neuron, sodium and potassium pumps restore ions to their original polarized state.
3 a stimulus reaches the neuron and gated ion channels in the cell membrane open and allow sodium ions to rush in
4 potassium gates close when there are more potassium ions outside the cell then sodium ions inside. the cell has greater potential and is hyperpolarized
5 potassium gates open and allow potassium ions inside the cell to leave while sodium gates close and keep sodium ions inside the cell, repolarizing the cell.
6 the resting neuron is inactive and polarized – the outside of the cell is positive from excess sodium ions and the inside is negative from excess chloride ions

Explanation:

This sequence follows the standard physiological process of a nerve impulse, starting from the resting state, progressing through stimulus reception, depolarization, action potential, repolarization, hyperpolarization, and finally returning to the resting state via ion pumps.

Answer:

1. 6. The resting neuron is inactive and polarized – the outside of the cell is positive from excess sodium ions and the inside is negative from excess chloride ions
2. 3. A stimulus reaches the neuron and gated ion channels in the cell membrane open and allow sodium ions to rush in
3. 1. If the neuron reaches its threshold level all gates open, allowing complete depolarization of the cell and creating an action potential
4. 5. Potassium gates open and allow potassium ions inside the cell to leave while sodium gates close and keep sodium ions inside the cell, repolarizing the cell
5. 4. Potassium gates close when there are more potassium ions outside the cell then sodium ions inside. The cell has greater potential and is hyperpolarized
6. 2. After the impulse travels through the neuron, sodium and potassium pumps restore ions to their original polarized state