Ch. 7.5 Muscular System Key terms
What's Voluntary?
Having control over an action.
What's visceral muscle?
Muscle found in the internal organs of the body it is involuntary.
What's Tendons?
Strong, tough, fibrous connective-tissue cords that attach muscles to bones
What's Supination?
Turning a body part upward.
What's skeletal muscle?
Muscle that is attached to bones and causes body movement; it is voluntary.
What's Rotation?
Turning a body part around its own axis; for example, turning the head from side to side.
What's Pronation?
Turning a body part downward.
What's plantar flexion?
Bending forward or bending the foot away from the knee.
What's Origin?
The end that does not move when the muscle attaches to a bone
What's muscular system?
system made up of more than 600 muscles in the body.
What's muscle tone?
A state of partial contraction where muscles are partially contracted at all times, even when not in use; described as a state of readiness to act.
What's Involuntary?
Functioning without conscious thought or control.
What's Insertion?
The end that moves when the muscle contracts.
What's Flexion?
Decreasing the angle between two bones, or bending a body part.
What's Fascia?
Increasing the angle between two bones, or straightening a body part.
What's Extension?
Increasing the angle between two bones, or straightening a body part.
What's Extensibility?
The ability to be stretched.
What's Excitability?
Irritability, the ability to respond to a stimulus such as a nerve impulse.
What's Elasticity?
The property that allows the muscle to return to its original shape after it has contracted or stretched.
What's Dorsiflexion?
Bending backward or bending the foot toward the knee.
What's Contracture?
A severe tightening of a flexor muscle resulting in bending of a joint.
What's contractibility?
The characteristic of muscle fibers that are stimulated by nerves to contract, or become short and thick, which causes movement.
What's Circumduction?
The muscle that forms the walls of the heart and contracts to circulate blood; it is involuntary.
What's cardiac muscle?
The muscle that forms the walls of the heart and contracts to circulate blood; it is involuntary.
What's Adduction?
Moving a body part toward the midline.