Lesson
Muscles - continued
Skeletal Muscle Action
-Muscles act on all joints they cross, can ONLY PULL (not push)
-FOUR PROPERTIES – Extensibility, Elasticity, Irritability,
& Tension Development
-Force produced by skeletal muscle proportional to cross
sectional area
-Skeletal muscles produce force to move/stabilize skeleton
-Force is transferred to tendons, which pull on bones
-Bones move towards one another.
-Muscle attachment on more stationary, usually proximal
bone = ORIGIN
-Attachment on more movable, distal bone = INSERTION