A Recording Electrode Is Placed into a Nerve Cell to Measure

question 462

Multiple Choice

A recording electrode is placed into a nerve cell to measure the membrane potential at a particular point.When the physiologist glances at the recording and sees that the membrane at that instant has a potential of +15 mV, she knows that the portion of the membrane being recorded is which of the following

• A)in the normal resting state
• B)in the reversal phase of an action potential
• C)more permeable to Ca²⁺ than normal
• D)in the after hyperpolarization phase of an action potential

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Definitions:

T-test

A statistical test used to compare the means of two groups or test a single mean against a known value.

Critical Value

A point on the scale of the test statistic beyond which we reject the null hypothesis; it defines the cutoff between significance and non-significance.

Null Hypothesis

A hypothesis that suggests there is no significant difference between specified populations, or no association among groups.

Null Hypothesis

A statistical hypothesis that assumes no effect or no difference in an experiment or study, serving as the default assumption to be tested.