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Unformatted text preview: c. Decreased sympathetic stimulation d. all of the above 4) True or False : the body has to expend energy for both passive inspiration and passive expiration? 5) Which of the following are purposes of the pleural sac? (two answers) a. Prevent blood from leaking into the chest cavity b. Reduce friction caused by the expansion and contraction of the lungs c. Allows consistent pumping of blood throughout the body d. Help the alveoli to expand...
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- Spring '10