ANSWERS: 3
  • I wouldnt call it pairs. You can Isolate the Majority of the workload of one muscle. Since all muscles in your body pull and dont push, the secondary muscles are stabilizers.
  • The human body is split. the left side is identical to the left side, except for the reproduction organs. I would not call working in pairs as a definition. I would compare human muscles to a chain. Each link(muscle) depends on another muscle, to perform and contribute to the performance of an act. Chain links and human muscles have a lot in common.
  • Muscles can only pull they cannoy push so they have to work in pairs in order for any movement to take place. As one muscles contracts (becomes shorter) the other one of the pair has to relax(it lengthens). This causes movement at the joing around which the two muscles are attatched. Agonist (Prime mover) This is the muscle which contracts to initiate movement. Antagonist This is the muscle which relaxes and lengthens to allow movement to take place. An example of muscles working in pairs is a bicep curl. The bicep brachii contracts and shortens which makes it the agonist and the tricep brachii relaxes and lengthens which makes it the antagonist to control movement.

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