Which respiratory-associated muscles would contract or relax during forced expiration, for example blowing up a balloon? a. diaphragm would contract, external intercostals would relax b. internal intercostals and abdominal muscles would contract c. external intercostals would contract and diaphragm would relax d. diaphragm contracts, internal intercostals would relax?
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Which respiratory-associated muscles would contract or relax during forced expiration, for example b...
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