chapter 5( muscular) Flashcards
muscles
a bundle of elastic tissue that contracts
insertion
more movable bone, mores towards the stable bone Origin
Example of origin/insertion
bicep flex, insertion moves to the top origin
Parallel fibers
long, more range of motion
Oblique fibers
shorter, great strength potential
parallel fibers arrangement
Strap
Fusiform
Rhomboidal
Traingular
oblique fibers
unipennate, bipennate, multipennate
Characteristics of muscles
irritability, contractibility, extensibility, elasticity
Tension
force built up
Shorten
½ of normal resting length
Excursion
distance from max elong to max short
Active insufficiency
muscle cannot be shorten farther
Passive insufficiency
muscle cannot be elongated any farther
Isometric
muscle contract produce force w/o change
Isotonic
muscle contract w/t change L/ angle (flex dumbbell)