What Happens When the Arrector Pili Muscles Contract

question 28

Multiple Choice

What happens when the arrector pili muscles contract?

• A) Your head nods "yes."
• B) Your leg kicks out.
• C) The hairs on your skin stand on end.
• D) The blood from your skin is rerouted to your core.
• E) You tap your finger.

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The probability of observing results at least as extreme as those measured, assuming the null hypothesis is true.

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