When does rigor mortis start to develop?

Which of the following must take place in order to expose the myosin-binding site?

A long-distance runner is likely to have a ______ proportion of __________ muscles.

What is the role of troponin in muscle contraction? 

Which of the following contributes to the regulation of muscle tension?

In an antagonistic muscle pair, the contracting muscle is referred to as the ________, and the relaxing muscle is referred to as the _________.

Earthworms have a type of movement in which rhythmic waves of muscle contractions are produced from head to tail. This movement is called _____.