Adenosine Triphosphate Hydrolyzation

During a twitch contraction, ATP is hydrolyzed to fuel the following reactions (choose the two that apply):

Group of answer choices

the power stroke of the myosin heads

the detachment of myosin heads from actin and the recovery stroke

the Ca2+ reuptake pumps

the closing of mechanically-gated Ca2+ channels

the opening of voltage-gated Ca2+ channels