Respuesta :
Drug x blocks atp regeneration from adp and phosphate. The muscle cells will not respond to this drug.
How does ATP work?
ATP provides the energy for muscle contraction. The three mechanisms for ATP regeneration are creatine phosphate, anaerobic glycolysis, and aerobic metabolism. Creatine phosphate provides about the first 15 seconds of ATP at the beginning of muscle contraction.
Anaerobic glycolysis produces small amounts of ATP in the absence of oxygen for a short period. Aerobic metabolism utilizes oxygen to produce much more ATP, allowing a muscle to work for longer periods. Muscle fatigue, which has many contributing factors, occurs when muscle can no longer contract. An oxygen debt is created as a result of muscle use.
The three types of muscle fiber are slow oxidative (SO), fast oxidative (FO) and fast glycolytic (FG).
- SO fibers use aerobic metabolism to produce low power contractions over long periods and are slow to fatigue.
- FO fibers use aerobic metabolism to produce ATP but produce higher tension contractions than SO fibers.
- FG fibers use anaerobic metabolism to produce powerful, high-tension contractions but fatigue quickly.
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