4:55 Quiz 3 0:07:15 elapsed The stage in action potential that immentian.ca depolarization is known as a) threshold b) polarization c) absolute refractory period d) refractory period e) repolarization Question 12 (1 point) $$ \leftarrow $$ e $$ \rightarrow $$

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To answer the question regarding the stage in action potential that is associated with depolarization, let's analyze the options provided:

1. **Threshold**: This is the level of depolarization that must be reached for an action potential to occur, but it is not the stage of depolarization itself.

2. **Polarization**: This refers to the state of the neuron at rest, where the inside of the cell is more negative compared to the outside. It is not related to the depolarization phase.

3. **Absolute Refractory Period**: This is the period during which no new action potential can be initiated, regardless of the strength of the stimulus. It occurs after depolarization and is not the depolarization phase itself.

4. **Refractory Period**: This term generally refers to the time following an action potential during which the neuron is less excitable. It includes both the absolute and relative refractory periods, but again, it is not specifically the depolarization phase.

5. **Repolarization**: This is the phase that follows depolarization, where the membrane potential returns to a more negative value after the peak of the action potential.

Given these definitions, the correct answer to the question about the stage in action potential that is associated with depolarization is:

**None of the options directly state "depolarization," but the closest related term is "threshold," as it is the point at which depolarization begins. However, if we strictly consider the phase of action potential characterized by depolarization, none of the options accurately describe it.**

If you need to select one from the given options, the best choice would be **a) threshold**, as it is the point at which depolarization starts.
The stage in action potential associated with depolarization is **threshold**.

4:55 Quiz 3 0:07:15 elapsed The stage in action potential that immentian.ca depolarization is known as a) threshold b) polarization c) absolute refractory period d) refractory period e) repolarization Question 12 (1 point) \( \leftarrow \) e \( \rightarrow \)

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