Muscular System Flashcards
(37 cards)
Shoulder muscles
Deltoid, pectorals major, trapezius
Elbow muscles
Bicep bracci, tricep bracci
Radio-ulna muscles
Pronator teres, supinator muscle
Knee muscle
Rectus femoris, vastus medialis/laterallis/intermedius
Ankle muscle
Soleus, gastrocnemius, tibialis anterior
Types of muscle contraction
Isometric, concentric, eccentric
calf muscles
Gastrocnemius, soleus
Fixator muscle
Helps stabilise a joint
Isometric
No movement
Concentric
Muscle shortens as in contracts, against gravity
Eccentric
Muscle lengthens as it contracts
Hypertrophy
Increases size of a muscle
Contraction time
Speed at which muscle contracts
Motor neurone
Number of muscle fibres attatched to a single nerve
Resistance to fatigue
How quickly fibres get tired
Forced production
How hard fibres contract
Mitochondria
Power house of body, provides energy to muscle fibres using oxygen
Capillary density
Provide opportunity for oxygen to diffuse into muscles
Oxidative capacity
Muscles capacity to use oxygen when working
Glycolytic capacity
Body’s capacity to use glycogen when working
Major fuel
Preferred fuel source the muscle likes to use
Hyperplasia
The muscle fibres split to increase their numbers
Slow twitch fibre (type 1)
Slow contractile speed of muscle fibres, energy source is fats, aerobic
Fast oxidative twitch fibre (type 2A)
Medium contractile speed of muscle fibres, uses glycogen for energy, anaerobic