A: Unfortunately, many long-term effects of medications are not known since many medications are not studied for over 6 to 12 months. Adderall (amphetamine/dextroamphetamine) is a medication that has been used for many years in the treatment of ADHD and narcolepsy.
Answer by Nicole Cooper. Confidence votes 32. The role ATP plays in muscle contraction is that ATP binds to sites on myosin heads, inducing a conformational change in the actin binding site and reducing the affinity for the actin substrate. Hydrolysis of ATP then cocks the myosin head and moves it closer to the z disk.
Under resting conditions, muscle cells can make plenty of ATP to support contraction. As ATP is an unstable molecule and more ATP is made than is needed under resting conditions, the excess ATP is broken down by creatine phosphokinase, which catalyzes the synthesis of creatine phosphate (CP) from ATP and creatine.