Muscles occur in antagonistic pairs because:
A) they are incapable of working agonistically.
B) actin and myosin filaments can only move in one direction.
C) both contraction and extension would cause an oxygen debt.
D) contraction is voluntary, while relaxation is involuntary.
E) they are only capable of contracting and not pushing.

Question

Quizplus · Accepted Answer

Muscles can only contract and not push, so they work in pairs to move bones in opposite directions.

Muscles Occur in Antagonistic Pairs Because