CLASSWORK - Ch. 7.5 Muscular System Key terms

CLASSWORK - Ch. 7.5 Muscular System Key terms

100

abduction

abduction: moving a body part away from the midline

200

adduction

adduction: moving a body part toward the midline

300

cardiac muscle

cardiac muscle: forms the walls of the heart and contracts to circulate blood

400

circumduction

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

500

contractibility

contractibility: muscle fibers that are stimulated by nerves contract, or become short and thick, which causes movement

CLASSWORK - Ch. 7.5 Muscular System Key terms

100

dorsiflexion

dorsiflexion: bending backward or bending the foot toward the knee

200

contracture

contracture: a severe tightening of a flexor muscle resulting in bending of a joint

300

elasticity

elasticity: allows the muscle to return to its original shape after it has contracted or stretched

400

excitability

excitability: irritability, the ability to respond to a stimulus such as a nerve impulse

500

extensibility

extensibility: the ability to be stretched

CLASSWORK - Ch. 7.5 Muscular System Key terms

100

extension

extension: increasing the angle between two bones, or straightening a body part

200

fascia

fascia: a tough, sheetlike membrane that covers and protects the tissue

300

flexion

flexion: decreasing the angle between two bones, or bending a body part

400

insertion

insertion: The end [of a muscle] that moves when the muscle contracts

500

involuntary

involuntary: meaning they function without conscious thought or control

CLASSWORK - Ch. 7.5 Muscular System Key terms

100

muscle tone

muscle tone: a state of partial contraction ... sometimes described as a state of readiness to act

200

muscular system

muscular system: More than 600 muscles make up the system known as the muscular system.

300

origin

origin: When a muscle attaches to a bone, the end that does not move

400

plantar flexion

plantar flexion: bending forward or bending the foot away from the knee

500

pronation

pronation: turning a body part downward

CLASSWORK - Ch. 7.5 Muscular System Key terms

100

rotation

rotation: turning a body part around its own axis

200

skeletal muscle

skeletal muscle: is attached to bones and causes body movement

300

supination

supination: turning a body part upward

400

tendons

tendons: strong, tough, fibrous connective-tissue cords

500

visceral(smooth) muscle:

visceral (smooth) muscle: also called smooth muscle, is found in the internal organs of the body... [it] contracts to cause movement in these organs