What step DIRECTLY causes a sarcomere to shorten? cross- bridge formation  calcium transport into SR calcium release  power stroke myosin heads in high energy state

Drag the correct label to the appropriate structure on the neuromuscular synapse. Neuromuscular junction Motor end plate Path of action potential Motor neuron Axon Myofibril Muscle fiber Re

When the action potentials stop, the concentrations of the contraction cycle. calcium O ATP O phosphate O sodium inside the muscle cells will drop and mark the end of

this is an anotomy/physilogy question

Calcium binding to calmodulin causes phosphorylation of what protein in what type of muscle? I Otroponin in skeletal and cardiac muscle only troponin in smooth muscle only actin in cardiac and smooth muscle actin in smooth muscle only myosin in smooth muscle only

write down in order  Place in order the events that occur for a muscle contraction to begin at a sarcomere.       Calcium ion is removed from troponin-tropomyosin on actin   Calcium binds with troponin-tropomyosin on actin   Actin joins myosin forming crossbridge   Action potential depolarizes T-tubules   Vesicles within terminal axon release ACh which diffuses across synaptic cleft   Calcium ions release from sarcoplasmic reticulum   ATP binds to myosin crossbridge, breaking bond

Place the following terms in the correct order 1-9 in the movement of actin filaments by myosin motors.   Hydrolysis of ATP Myosin releases ADP Myosin releases Pi Power stroke ATP binds to myosin Myosin weakly binds to actin Myosin tightly binds to actin Myosin releases actin Myosin head cocks

The cross bridge cycle can generate tension in skeletal muscle cells during sarcomere elongation sarcomere shortening no change in sarcomere length all of the above

Select the most accu