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.
The light chains are the Essential Light Chains (ELC) and Regulatory Light Chains (RLC). Overall activity and polymerization can be modulated by phosphorylation on the light chains and the C-terminus of the heavy chains respectively. The role of myosin II in muscle contraction. Myosin II provides the motive force behind the contraction of muscle cells, working in concert with the actin filaments. The sliding filament theory first suggested by Hugh Huxley (Huxley & Hanson, 1954) is now widely accepted.