Ch. 7.5 Muscular System key Terms
What is adduction?
moving a body part toward the midline
What is contracture?
a severe tightening of a flexor muscle resulting in bending of a joint
What is extension?
increasing the angle between two bones, or straightening a body part
Whatv is muscle tone?
Muscles are partially contracted at all times, even when not in use. This state of partial contraction is called muscle tone
What is abduction?
moving a body part away from the midline
What is dorsiflexion?
bending backward or bending the foot toward the knee
What is fascia?
a tough, sheetlike membrane that covers and protects the tissue.
What is muscular system?
an organ system consisting of skeletal, smooth, and cardiac muscle
What is cardiac muscle?
Cardiac muscle forms the walls of the heart and contracts to circulate blood.
What is elasticity?
allows the muscle to return to its original shape after it has contracted or stretched
What is flexion?
decreasing the angle between two bones, or bending a body part
What is origin?
When a muscle attaches to a bone, the end that does not move is called the origin.
What is circumduction?
moving in a circle at a joint, or moving one end of a body part in a circle while the other end remains stationary, such as swinging an arm in a circle
What is excitability?
irritability, the ability to respond to a stimulus such as a nerve impulse
What is insertion?
The end that moves when the muscle contracts is called the insertion
What is plantar flexion?
bending forward or bending the foot away from the knee
What is contractibility?
muscle fibers that are stimulated by nerves contract,
What is extensibility?
the ability to be stretched
What is involuntary?
a muscle that works automatically and that you do not control in a conscious way
What is pronation?
turning a body part downward