Sally has just heard a strange noise in her basement. Which of the following is an example of normal autonomic nervous system function during this type of situation?
A. Sally's breathing becomes slower to allow for better gas exchange.
B. Sally's heart rate increases preparing for possible activity.
C. Sally's muscle tone increases as she becomes paralyzed with fear.
D. Sally's heart rate decreases to allow her to hear the noise better.
Answer: B
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