Muscular skeletal system Flashcards
Articulation
Where two or more bones meet to form a joint
Elevation
Movement of the shoulders upwards
Eversion
Turning of the sole of the foot laterally outwards
Inversion
Turning of the sole of the foot medially inwards.
Pronation
Rotation of forearm so it faces downwards - tennis forehand topspin.
Supination
Rotation of forearm laterally so that hand faces upwards - right hand action in a hockey flick
Isometric
Static muscle contraction
Isotonic
Muscle extends or shortens in size.
Concentric
Muscle shortening
Eccentric
Muscle lengthening
Synergist Muscle
Holds the body in position so the agonist can operate.
Preventing any unwanted movements whilst the agonist is contracting.
Fixator Muscle
Immobilises the bone of the prime movers origin providing a stable base for the action of the prime mover.
First Class lever
LFE
Second Class lever
FLE - Load is always bigger than the effort - Mechanical Advantage
Third Class lever
FEL - Mechanical Disadvantage as the effort is bigger than the load.
Newtons first law
When there is zero net force acting on an object the object is stationary or remaining at a constant velocity.
Law of inertia
A massive object will remain at rest and will require a force to shift it and once moving will require a force to change its motion.
Newtons second law
Bigger the force,the greater the acceleration of the person.
A stronger sprinter should be able to accelerate
The more mass an object has,the more acceleration for a given force.
F = M x A
Newtons third law
For every reaction there is an equal and opposite reaction.
