The External Anal Sphincter

question 191

Multiple Choice

The external anal sphincter:

• A)is the last part of the defecation reflex arc
• B)provides voluntary control of defecation
• C)both A and B
• D)both A and B and is made of smooth muscle

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Definitions:

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true, typically denoted as alpha.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution without violating any constraint.

Equal-variances T-test

A statistical test used to compare the means of two groups, assuming that both groups have the same variance.

Normal Populations

Populations in which the distribution of data points follows a normal distribution curve, important in many statistical methods.