14 Jun SPORTSCI 101 – How does a nerve impulse stimulate generation of force/tension in skeletal muscle
Question
1. How does a nerve impulse stimulate generation of force/tension in skeletal muscle? Include in your answer what chemical helps transfer the signal from nerve to muscle, what cross-bridge cycling is and the two major filaments of muscle involved in this process. (Hint: Chapter 3, The Biophysical Foundations of Human Movement (Ch 2 in 2nd Ed)).
2. When you start engaging in an aerobic exercise session, what immediate response (increase/decrease/no change) would you see in the following physiological variables and briefly explain in a sentence or two why?
Variables: Heart rate, ventilation rate, oxygen consumption, sweat rate
3. Draw a graph which indicates the relationship between power output and oxygen consumption (exact numbers are not required; label axes and include units).
4. Draw a graph which indicates the relationship between power output and heart rate. If the graph you drew was for a sedentary person, on the same graph, draw another curve and indicate the relationship between power output and heart rate of an athlete (exact numbers are not required; label axes and include units).
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