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Stimulation of the sympathetic part of the autonomic nervous system is responsible for
The following anaesthetic agents cause direct sympathetic stimulation
Listening to music during exercise improves exercise performance and reduces discomfort. Scientists researched whether listening to music while studying can help students learn better and the results were inconclusive. Students who needed external stimulation for studying fared worse while students who did not need any external stimulation benefited from music.  Which one of the following statements is the CORRECT inference of the above passage? 
Duration of inspiration is decreased and rate of ventilation is increased due to stimulation of