Which of the following best describes a muscle contraction?
A) At the signal to contract, ATP provides energy to allow sacromeres to slide over myosin filaments, pulling z-disks together.
B) At the signal to contract, myosin produces energy to allow actin filaments to slide over z-disks, pulling sacromeres together.
C) At the signal to contract, ATP provides energy to allow myosin heads to pull the actin filaments thereby pulling z-disks closer together.
D) At the signal to contract, ATP provides energy to allow myofibrils pull z-disks closer together.
E) At the signal to contract, ATP provides energy to allow tendons to pull sacromeres closer together.
Correct Answer:
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