1.1.8 Antagonistic muscle pairs

• What is the role of the prime mover in an antagonistic muscle pair?

  Produces movement
• Match the antagonistic muscle pair with the movement they control:

  Biceps and Triceps ↔️ Elbow flexion and extension

  Deltoids and Pectoralis major ↔️ Shoulder abduction and adduction

  Iliopsoas and Gluteus maximus ↔️ Hip flexion and extension

  Gastrocnemius and Tibialis anterior ↔️ Ankle plantar flexion and dorsiflexion
• The prime mover contracts while the antagonist relaxes in an antagonistic muscle pair


  True
• The biceps contracts during elbow flexion, while the triceps relaxes


  True
• Antagonistic muscle pairs are muscles that work together in opposite pairs to control joint movement
• Which muscle acts as the prime mover for hip flexion?

  Iliopsoas
• During elbow flexion, the triceps contracts while the biceps relaxes.

  False
• When performing a bicep curl, the biceps acts as the prime mover, while the triceps acts as the antagonist
• During elbow flexion, the triceps acts as the antagonist

  True
• Which muscle is the antagonist during ankle plantar flexion?

  Tibialis anterior
• Antagonistic muscle pairs control joint movement
• Coordination between antagonistic muscles prevents jerky or uncontrolled movements
• In the elbow, the prime mover for flexion is the biceps
• Steps involved in antagonistic muscle pair action during movement

  1️⃣ Prime mover contracts

  2️⃣ Antagonist relaxes

  3️⃣ Joint moves smoothly
• What is the antagonist muscle during hip flexion in kicking a soccer ball?

  Gluteus maximus
• The prime mover in an antagonistic muscle pair is also called the agonist
• The iliopsoas is the prime mover for hip flexion
• What is the prime mover during elbow extension?

  Triceps
• Why is coordination between antagonistic muscles important?

  Smooth, controlled movements
• What is the role of the prime mover in antagonistic muscle pairs?

  Produces movement
• Match the muscle group with its prime mover and antagonist:

  Elbow ↔️ Biceps and Triceps

  Shoulder ↔️ Deltoids and Pectoralis major

  Ankle ↔️ Gastrocnemius and Tibialis anterior
• Coordination between antagonistic muscles ensures controlled, precise movements