Ch. 7.5 Muscular System Key terms

Ch. 7.5 Muscular System Key terms

100

Abduction-

Moving a part away from the midline of the body.

200

Contracture-    

A severe tightening of a flexor muscle resulting in a bending of a joint.

300

.Extension-

Increasing the angle between two bones, or straightening a body part.

400

Muscle tone-

The state of partial contraction maintained by muscles at all times; a state of readiness to act.

500

Rotation- 

Turning a body part around its own axis (e.g., turning the head from side to side).

Ch. 7.5 Muscular System Key terms

100

Adduction-

 Moving a part toward the midline of the body.

200

Dorsiflexion    

-Bending backward (e.g., bending the foot toward the knee).

300

Fascia-

 A tough, sheetlike membrane that covers, separates, and protects muscle tissue.

400

Muscular system- 

The system composed of over 600 muscles responsible for all movement of the body.

500

Skeletal muscle-

Muscle attached to bones that causes body movement; it is voluntary.

Ch. 7.5 Muscular System Key terms

100

Cardiac muscle-

The muscle that forms the walls of the heart and contracts to circulate blood.

200

Elasticity-

 The ability of muscle tissue to return to its original shape after being stretched or contracted.

300

Flexion-

Decreasing the angle between two bones, or bending a body part.

400

.Origin-

The end of the muscle attachment that is fixed or does not move when the muscle contracts.

500

Supination- 

Turning a body part upward (e.g., turning the palm up).

Ch. 7.5 Muscular System Key terms

100

Circumduction-

Moving a body part in a circular motion at a joint, or swinging one end of a body part in a circle while the other end remains stationary.

200

Excitability-

 The ability of muscle tissue to respond to a stimulus (like a nerve impulse); also called irritability.

300

Insertion-

The end of the muscle attachment that moves when the muscle contracts.

400

Plantar flexion-

Bending forward (e.g., bending the foot away from the knee).

500

Tendons-

Strong, tough, fibrous connective-tissue cords that connect skeletal muscles to bones.

Ch. 7.5 Muscular System Key terms

100

Contractibility-

 

The ability of muscle tissue to contract and shorten.

200

Extensibility-

The ability of muscle tissue to stretch or extend.

300

involuntary-

Functioning without conscious thought or control (e.g., cardiac and visceral muscle).

400

Pronation-

Turning a body part downward (e.g., turning the palm down).

500

Visceral muscle-

 Also called smooth muscle, found in the internal organs of the body (e.g., digestive and respiratory systems).