Before heading to the tour de france a cyclist had a muscle biopsy in his leg. the tests revealed that the dominant muscle fibers were low in myosin atpase activity and anaerobic enzymes, high in capillary density and myoglobin content.
a.) what muscle fiber is dominant in this athlete? why?
b.) what is the primary source of atp generation in this muscle for the athlete as he steadily climbs the mountains of france?
c.) for this athlete to maintain force production, what direct change in ion concentration must occur (identify specific ion, cellular location, and if the concentration level will increase or decrease) (hint what ion directly influences fibers that allow for muscle force to occur)?
d.) what factors determines fore output in a muscle contraction, provide a brief explanation/reason to your answer?
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