Rating Newest Oldest. Best Answer: Once muscle contraction starts the regeneration of ATP must occur rapidly. There are three primary sources of ATP which, in order of their utilization, are creatine phosphate (CP), anaerobic glycolysis, and oxidative phosphorylation. Energy from ATP derives from cleaving of the terminal phosphate of the ATP molecule.
Under the new rules, pilots will be able to be on duty for nine to 14 hours â a number that will fluctuate based on factors such as when the pilotâs day begins and how many segments he or she will fly in one day. Pilots will be able to fly no more than nine hours during that period.
The big change came in 1985. From then on, major airline pilots were required to have at least an eight-hour break between shifts on duty. As before, they could fly up to 30 hours per week, 100 hours per month, and 1,000 hours per year. Here's how the rule works: Every time a pilot completes a flight, you should be able to look back at the preceding 24 hours and find at least nine consecutive hours of off-duty rest time.