muscular system

• antagonistic muscles are pairs of muscles that work against each other
• the muscle that is contracting is the agonist and the muscle that is relaxing is called the antagonist
• what is an example of an antagonistic muscle pair in the elbow at flexion?

  Biceps (agonist) and triceps (antagonist)
• what is an example of an antagonistic muscle pair in the knee at flexion?

  Hamstrings (agonist) and quadriceps (antagonist)