contestada

PLEASEEEEE HELP 30 POINTS
Muscles work in _______ to move bones. When one muscle contracts and ______ while the other releases and ________

Respuesta :

Answer:

Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.

Otras preguntas

Q&A Education