Muscular System Flashcards
What does the deltoid do?
Abduction
Outward arm action in a jumping jack
What do the pectorals do?
Adduction of the shoulder
Upward phase of a press-up
What does the tricep do?
Extend the elbow
Shooting in basketball
What does the bicep do?
Flex the elbow
Doing a bicep curl
What do the abdominals do?
Flex the trunk across the stomach
Performing a sit-up
What does the Latissimus Dorsi do?
Shoulder adduction
Butterfly stroke in swimming
What do the quadriceps do?
Extend the knee
Kicking a ball
What do the hamstrings do?
Flex knee
Performing a hamstring curl
What do the gastrocnemius do?
Plantar flexion of the ankle (pointing the toes downwards)
When cycling
What does the tibialis anterior do?
Dorsiflexion of the ankle (bringing the toes up towards the shin)
Foot making contact with a football
What is an isotonic contraction?
When a muscle contracts and changes length
What is an isotonic concentric contraction?
Involves the muscle shortening
What is an isotonic eccentric contraction?
Involves the muscle lengthening whilst it is under tension.
What is an isometric contraction?
This involves a muscle producing tension but staying the same length.
What’s an agonist muscle?
The muscle that is contracting
