Body Building and Muscles

1. Do Muscles pull or push?
Muscles pull.

2. What happens when one muscle of the pair contracts (shortens)?
When one muscle of the pair contracts the other one relaxes.

3. In what ways is the model accurate?
It shows how muscles are located in your body and it also shows how muscles contract and relax.
4. In what ways is the model inaccurate?
It is inaccurate because in real life muscles contract and relaxes but the rubberband only gets shorter.