Chapter 33 The Nervous System.pdf
Chapter 33 The Nervous System.pdf
Chapter 33 The Nervous System.pdf
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<strong>Chapter</strong> <strong>33</strong><strong>Nervous</strong> <strong>System</strong><strong>33</strong>.2 Organization of the <strong>Nervous</strong> <strong>System</strong>• <strong>The</strong>re are two branches of the autonomicnervous system.• <strong>The</strong> sympathetic nervous system is mostactive in times of emergency or stress whenthe heart rate and breathing rate increase.• <strong>The</strong> parasympathetic nervous system is mostactive when the body is relaxed.
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