Muscular System Flashcards
What do voluntary muscles do?
Make the body move as they are attached to bones
Provide an example of voluntary muscles
Pectorals and trapezius
What do involuntary muscles do
Work internal organs, outside our control
What’s a cardiac muscle?
A muscle that is unique to the heart, never tires
What’s an origin
Place the muscle starts
What’s an insertion
Place the muscle finishes
What’s the relaxing muscle called
Antagonist
What’s the contracting muscle called
Agonist
What are muscles made up of
Muscle fibres
What happens when muscle fibres contract
They pull on the bone and cause movement
Can muscles push?
No
Why do muscles work in pairs?
So the bone can move forward and backwards
What are the 5 types of muscle action
Extension, flexion, adduction, abduction, rotation
What’s type 1?
Slow twitch
What’s type 11a?
Combination
What’s type 11x?
Fast twitch
What happens at plantar flexion?
The toes point down(gastronemius)
What happens at Dorsiflexion?
When toes pull up(tibialis anterior)
Name the 2 types of contraction
Isometric and isotonic
Does anything move with isometric contractions?
No
Does anything move with isotonic contractions?
Yes
What type of training is usually with isometric contractions?
Weight and circuit
Is isometric used in sport?
Not often
What type of contraction is concentric
Isotonic
What type of contraction is eccentric
Isotonic
What is concentric contraction
When a muscle shortens creating movement
What is eccentric contraction
When a muscle lengths as it contracts, a slow or controlled movement
Which is more common
Concentric
Name an example of eccentric contraction
Quadriceps in downward phase of a squat
