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Skeletal muscle

Is voluntary, striated, and made up of long slender striped cells. Contracts quickly in response to stimulation, and act in opposing groups

Smooth muscle

Is involuntary, non-striated, and composed of sprindle-shaped cells. Found in viscera, especially the stomach. Contracts slowly

Cardiac muscle

Is Involuntary, partially striated; special tissue found only in the heart

Major functions of muscles

Assist in conducting nerve impulses to brain, assist in movement, produce heat, and protect organs

Epimyseum

Muscles are enclosed in this

Tendon

When epimyseum extends in a strong, tough cord that is continuous with the periosteum

Origin

Superior, less moveable part of muscle

Body or belly

Middle portion of muscle

Insertion

Distal end of muscle

Elasticity

The ability to resume former length when stretching force is removed

Tone or tonus

Slight tension present in the muscle even when muscle is resting.

Conductivity

The ability to transmit impulses

Contractility

The ability to contract or shorten and to thicken when a muscle shortens; it exerts pull

Extensibility

The ability to lengthen or stretch and hold

Tensors

Tense a part; make more rigid

Pronators

Turn palm downward

Levators

Lift a part

Sphincters

Ring-like muscles that close body openings

Abductors

Move away from a part

Rotators

Revolve a part on it's axis

Supinators

Turn the palm upward

Flexors

Bend a joint

Depressors

Lower a part

Adductors

Move toward a part or toward the midline

Extensors

Straighten a joint

Muscle contraction

Caused by response to natural or artificial stimulus

Proximal

Muscles that move a part lie ( ) to the part they move

Simple sugars

Muscle cells get energy to contract from ( )

Three criteria for remembering shapes of muscles

Action, shape, and numbers of divisions

Abdominal muscles

Broad thin muscles which support internal organs, assist in respiration, and assist in eliminating waste from the large intestine and bladder

Chest muscles

Assist in respiration and movements of the neck, arms, and trunk

Back muscles

Large broad muscles attached to the vertebrae which allow body to bend, turn, and stand erect

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