Which Is Most Directly Responsible for the Falling (Repolarizing)phase of the Action

question 3

Multiple Choice

Which is most directly responsible for the falling (repolarizing) phase of the action potential?

• A)Voltage-gated Na⁺ channels are opened.
• B)The Na⁺,K⁺ pump restores the ions to their original locations inside and outside of the cell.
• C)The permeability to Na⁺ increases greatly.
• D)ATPase destroys the energy supply that was maintaining the action potential at its peak.
• E)The permeability to K⁺ increases greatly while that to Na⁺ decreases.

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Definitions:

Type I Error

A statistical error that occurs when a true null hypothesis is incorrectly rejected, falsely indicating a significant effect.

Type II Error

The mistake of failing to reject a null hypothesis when it is actually false, leading to a false negative conclusion.

Statistical Tests

Procedures used in statistics to determine whether hypotheses about the distribution of data can be rejected, based on sample data.

Sample Size

The number of observations or subjects included in a study.