Muscles and Their Actions

What group of muscles are known as the antagonists to the quadricep muscles?

• The adductor muscles

• The abductor muscles

• The hip flexor muscles

• Hamstring muscles

Grace, Oliver, and Daniel are training for a marathon. They need to strengthen 3 specific muscles that help in flexing the knee and extending the hip. Which muscles should they focus on?

• Semimembranosus, semitendinosus, biceps femoris

• Vastus lateralis, vastus medialis, biceps femoris

• Gracilis, sartorious, TFL

• Piriformis, obturator internus, gemellus inferior

Emma, Noah, and Liam are training for a triathlon. They learned that a specific type of muscle contraction, where the muscle lengthens as it resists a load, is crucial for their training. What is this type of muscle contraction called?

• Agonist

• Eccentric

• Concentric

• Isometric

What is the term for a muscle that assists the primary muscle in performing a complex movement?

• Antagonist

• Stabilizer

• Synergist

• Agonist

The gracilis is a hip adductor. The action of its antagonist is hip _________.

Charlotte, Aiden, and Elijah are training for a marathon. They learned that a common imbalance occurs when core muscles are weak and their antagonists are overactive. They are curious to know, what is the antagonist to the core muscles in this scenario?

• Erector Spinae

• Transverse abdominis

• Psoas major

• Internal oblique

This muscle has anterior, medial, and posterior fibers. Its actions include shoulder flexion, abduction, and extension. What is the muscle?

• Triceps

• Deltoid

• Biceps

• Teres Major

What is the term for a muscle that directly opposes the action of a primary muscle?

• Agonist

• Antagonist

• Synergist

• Stabilizer

Name the muscle.

• Biceps brachii

• Brachialis

• Triceps brachii

• Pronator teres

What type of muscle contraction occurs when the muscle shortens while generating force?

• Eccentric

• Concentric

• Isometric

• Agonist