Ch. 7.5 Muscular System Key terms
turning a body part upward
Supination
muscular system
forms the walls of the heart
cardiac muscle
moving in a circle as a joint
circumduction
the ability to be stretched
Extendability
state if partial contraction
muscle tone
moving a body part away from the midline
Abduction
moving a body part toward the midline
adduction
The end that moves when the muscle contracts
insertion
The end that does not move
origin
when a person has control over their action
voluntary
the ability to respond to a stimulus
turning a body part around its own axis
movement caused by muscle fibers stimulated
contractibility
muscle fibers are unstriated
increasing the angle between two bones or straightening a body part
Extension
fibers are striated with alternating light and dark bands
skeletal muscle
bending backward or bending of the foot to the knee
Dorsiflexion
contracts to cause movement in organs
visceral muscle
turning a body part downward
Pronation
severe tightening of a flexor muscle resulting in bending of a joint
Contracture
allows the muscle to return to its original shape after it has been stretched
elasticity
decreasing the angle between two bones or bending a body part
Flexion
a tough sheet-like membrane that covers and protects the tissue
Fascia
bending forward or bending the foot away from the knee
plantar flexion