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

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 contraction of a muscle, calcium ions bind to ______ which moves _______ out of the way. This now uncovers binding sites on the __________ myofilament. multiple choice 1troponin; tropomyosin; myosintroponin; tropomyosin; actintropomyosin; troponin; myosintropomyosin; troponin; actin 2. What molecules are attached to the myosin head from the previous cycle of movement?  multiple choice 2ATP and phosphateADP and phosphateATP and calcium ionsADP and calcium ions 3. What is released in the process of cross-bridge formation?  multiple choice 3ADPPhosphateATPCalcium ions 4. When the myosin head is moved, what is released (from the myosin head)? multiple choice 4ATPADPPhosphateCalcium ions 5. After the myosin head returns to its upright position, what occurs if calcium ions are still present? multiple choice 5Actin myofilaments move away from the M line.The entire sequence is repeated.Troponin blocks the binding sites on actin.Myosin heads will no longer bind to actin.

During muscle contraction, binding sites for myosin are uncovered by the movement of ___________.Multiple ChoicetropomyosinADPactin myofilamentstroponin

The form of myosin in slow-twitch muscle fibers causes the muscle fibers to contract more Blank______.Multiple choice question.slowlyquickly

During skeletal muscle contraction, calcium binds to Blank______.Multiple choice question.ATPtropomyosintroponinactin