not purposeful, reflexes

Helps maintain tone

(ex: sitting in chair - back maintains tone to sit upright)

two types of phasic muscle contractions

tension in muscle but no change in joint

Isotonic is contracting but remaining joint change

types of isotonic

Which isotonic means muscle shortening ;

insertion moves closer to to origin

lengthening of muscle fibers

main muscle responsible for producing a specific movement :

concentric muscle contraction

steadies proximal parts of limb so movement can occur ;

isometric muscle contraction

complements action of prime mover ;

concentric muscle contraction ;

helps the agonist

a muscle that opposes the action of another muscle

helps to time, control, or coordinate movement ;

eccentric contraction

tendon connects

ligament connects

connective tissue layer between skin and muscle

small, fluid filled sack that reduces friction between two structures ;

found throughout body between joints