Ch. 7.5 Muscular System Keyer Category Name
What is abduction?
moving a body part away from 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.
What is muscle tone?
a state of partial contraction in muscles, even when not in use; sometimes described as a state of readiness to act.
What is roation?
turning a body part around its own axis; for example, turning the head from side to side.
What is adduction?
moving a body part toward 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?
The system made up of more than 600 muscles
What is skeletal muscle?
is attached to bones and causes body movement.
What is 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 the supination?
turning a body part upward.
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 [of a muscle] that moves when the muscle contracts.
What is plantar flexion?
decreasing the angle between two bones, or bending a body part.
What are tendons?
strong, tough, fibrous connective-tissue cords (that attach muscles to bones).
What is contractibility?
muscle fibers that are stimulated by nerves contract, or become short and thick, which causes movement.
What is extensibility?
the ability to be stretched.
What. is involuntary?
meaning they function without conscious thought or control.
WHat is pronation?
turning a body part downward.
What is visceral muscle?
also called smooth muscle, is found in the internal organs of the body... contracts to cause movement in these organs.