The break down of ATP by myosin-ATPase leads to Blank______.Multiple choice question.the cocking of the myosin headtransformation of troponinrecoil of the elastic fibersshortening of actin chains

During muscle contraction, each Blank______ monomer has an open active site to bind with the protein myosin.Multiple choice question.troponintropomyosinG-actin

Which of the following acts as an ATPase during the contraction cycle of muscle?Question 8Select one:a.actin moleculesb.the tail portion of the myosin moleculec.tropomyosin moleculesd.troponin moleculese.the head portion of the myosin molecule

The actin-myosin bond is broken by the binding of __________ to the myosin head.Multiple ChoiceATPphosphateADPtropomyosin

f all of the calcium within a muscle fiber was removed (but ATP was still present), which of the following could still occur?Check All That ApplyThe heads of the myosin myofilaments bind to G actin to form cross-bridges.The heads of the myosin myofilaments bind to G actin to form cross-bridges.An action potential that reaches the end of an axon results in the release of acetylcholine.An action potential that reaches the end of an axon results in the release of acetylcholine.The troponin molecules of thin filaments change shape, causing tropomyosin to move and expose myosin binding sites.The troponin molecules of thin filaments change shape, causing tropomyosin to move and expose myosin binding sites.Myosin heads return to their resting position as the recovery stroke occurs.

When myosin heads attach to actin filaments, ___________ is released.Multiple ChoiceADPATPtropomyosinphosphate