Muscular system Flashcards
how do the muscles make movement? muscles that work together like this are called?!
one muscle contracts whilst the other relaxes
antagonistic pairs
what is the muscle contracting called?
agonist
what is the muscle relaxing called
antagonist
what is an example of antagonistic pairs of muscles?
biceps and triceps
in a bicep curl- agonist muscle is bicep and antagonist muscle is the tricep
what is example of another pair of antagonistic muscles?
Quadriceps and Hamstrings
E.g. used when straightening the leg when going over a hurdle
hamstring - antagonist
Quads- agonist
what are the muscles in the butt called? their role? example?
gluteal muscles
extension of leg at the hip
kicking a ball in the football goal
where are the gastroCnemius? their role? example?
back of the lower leg.
pointing toes in gymnastics - extension at the ankle
what muscles are in the top of the shoulder? their role? example?
deltoid
aducts arm at the shoulder
lifting your arms to shoot in netball
where is the trapezius? example?
upper back
butterfly stroke in swimming
what muscles are in the side of the back? their role? example?
latissimus dorsi
adducts the upper arm
bringing arms back to your lift during a straight jump in trampolining
what muscles are in the front upper chest? their role? example?
pectorals
adducts the arm at the shoulder
forehand in tennis
where are the abdominals? example?
below upper chest
when diving in like
what are isotonic contractions?
they result in movement
what are isometric contractions?
muscles contract but no movement E.g. a rugby scum
what are 3 short term effect of physical activity on the muscular system
increase in temperature
increase in demand for oxygen
increase in latic acid
