The demands of exercise necessitate numerous physiologicalchanges in animals, especially in circulation and musclemetabolism. Consider prolonged exercise activity (e.g.long-distance migration or a marathon run in human exercise).
- Describe the changing demands in muscle metabolism as exerciseprogresses (from seconds to minutes to hours). How will the fuelused by locomotory muscles change?
- Describe the associated changes in respiration and circulationin order to meet the increased demand of skeletal muscle. Whatspecific changes in cardiac output and capillaries at the musclebed take place, and how are these regulated?
