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                                                                                            3. Epinephrine release




                  FACTORS                                                                   • Epinephrine also stimulates ventilation.





                  AFFECTING                                                                 • The level of circulating epinephrine rises




                                                                                                during exercise in response to the
                  RESPIRATION                                                                   sympathetic nervous system discharge




                                                                                                that accompanies increased physical


                                                                                                activity.
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