In skeletal muscle during a contraction cycle:
A) Myosin-ATP complex has a high affinity for actin.
B) Tropomyosin binds calcium.
C) The rigor complex is broken by the binding of ADP to myosin.
D) ATP hydrolysis provides the energy required for myosin flexure in the 'hinge regions'.
E) The T tubules take up calcium via an active transport mechanism.

Question

Quizplus · Accepted Answer

ATP hydrolysis provides the energy necessary for the conformational change in myosin, allowing it to "cock" into a position to bind to actin and perform the power stroke. This process involves the flexure or bending in the hinge regions of the myosin molecule.

In Skeletal Muscle During a Contraction Cycle