Ch. 7.5 Muscular System
What is abduction?
Abduction is moving a body part away from the midline.
What is contracture?
Contracture is a severe tightening of a flexor muscle resulting in bending of a joint, result of lack of use.
What is extension?
Extension is increasing the angle between two bones, or straightening a body part.
What is muscle tone?
Muscle tone is the state of muscle being partially contracted at all times.
What is rotation?
Rotation is turning a body part around its own axis.
What is adduction?
Adduction is moving a body part toward the midline.
What is dorsiflexion?
Dorsiflexion is bending backward or bending the foot toward the knee.
Fascia is tough membrane that covers and protects the tissue.
What is the muscular system?
The muscular system is made up of more than 600 muscles.
What is skeletal muscle?
Sketal muscle is attached to bones and causes body movement.
What is cardiac muscle?
Cardiac muscle forms the walls of the heart and contracts to circulate blood.
What is elasticity?
Elasticity allows the muscle to return to its original shape after it has contracted or stretched.
What is flexion?
Flexion is decreasing the angle between two bones, or bending a body part.
What is the origin?
The origin is the end of a muscle that does not move when attached to a bone.
What is supination?
Supination is turning a body forward.
What is circumduction?
Circumduction is moving in a circle at a joint or moving one end of a body part in a circle while the other end remains stationary.
What is excitability?
Excitability is irritability, the ability to respond to a stimulus such as a nerve impulse.
What is insertion?
Insertion is the end that moves when a muscle contracts.
What is plantar flexion?
Plantar flexion is bending forward or bending the foot away from the knee.
What are tendons?
Tendons are strong connective-tissue cords.
What is contractability?
Contractability is muscle fibers that are stimulated by nerves contracting, or become short and thick, which causes movement.
What is extensibility?
Extensibility is the ability to be stretched.
What is involuntary?
Involuntary is function without conscious thought or control.
What is pronation?
Pronation is turning a body part downward.
What is visceral muscle?
Visceral muscle is smooth muscle, contracts to cause movement in organs.