3. Ammonia, glucose, CO, lungs J. Multiple Choice Questions 1. During inhalation (a) Diaphragm relaxes and rib muscles contract (b) Diaphragm contracts and rib muscles relax (c) Both diaphragm and rib muscles relax (d) Both diaphragm and rib muscles contract
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Diaphragm relaxes and rib muscles contract
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Answer:(a) Diaphragm relaxes and rib muscles contract
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