If the Length of the Absolute Refractory Period in Cardiac

question 19

Multiple Choice

If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells, .

• A) it would be less than 1-2 m
• B) tetanic contractions might occur, which would stop the heart's pumping action
• C) it would be much longer before cardiac cells could respond to a second stimulation
• D) contractions would last as long as the refractory period

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Definitions:

Confidence Estimate

A range of values used to estimate a parameter, calculated in such a way that it is likely, to a specified level of confidence, to contain the true value of the parameter.

Confidence Interval

A set of values, calculated from sample statistics, predicted to hold the value of an unobserved population parameter.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values, indicating how much the values differ from the mean.

T-Distribution

A probability distribution used in statistics that arises when estimating the mean of a normally distributed population in situations where the sample size is small and population variance is unknown.