Deck 8 Muscular System-AMP Flashcards
TRUE or FALSE: Muscles can push and pull
FALSE: When a muscle contracts it pulls on the bone it is attached to. Muscles can only pull.
Describe an agonsist and antagonsist.
The muscle that shortens when contracting is the agonist (prime mover). The muscles that relaxes in opposition of the movement is the antagonist; it is this muscle that is then responsible for the opposing movement.
State 4 antagonsitic muscle pairs
At the elbow: Bicep and tricep.
At the knee: Quadriceps and hamstrings.
At the ankle: Tibialis anterior and gastrocnemius.
At the hip: Gluteals and hip flexors.
At the shoulder: Deltoid and latissimus dorsi.
Define synergist
Synergist: Muscles that enable the agonist to operate effectively. This muscle works with the agonist to control and direct movement.
Define fixator
Fixator: Muscles that stop any unwanted movement throughout the body by stabalising a joint. Fixator muscles stabilise the origin.
When a muscle contracts, one end remains stationary while the other end is drawn towards it. Which is the insertion and which is the origin?
The stationary end is called the origin.
The end that moves is called the insertion
TRUE or FALSE: Deltoids and Quadriceps are examples of a fixator during a bicep curl.
FALSE: Deltoids and pectorals are examples of a fixator during a bicep curl.
What is a synergist muscle for the gastrocnemius when creating plantarflexion at the ankle.
The soleus is a synergist muscle for the gastrocnemius when creating plantarflexion at the ankle.
Explain the roles or the antagonistic muscle pair working at the elbow during the throwing phase of a rugby line-out.
Movement = extension at elbow
Agonist= Tricep (contracting)
Antagonist= Bicep (Relaxing)
Explain the roles or the antagonistic muscle pair working at the hip during the upward phase of a squat
Movement = extension at hip
Agonist= Gluteals (contracting)
Antagonist= Hip flexors (Relaxing)
