| Term | Definition |
|---|
| Classifications for Skeletal Muscles | Is striated, made up of long slender striped cells; is attached to the skeleton and moves its parts; contracts quicly in response to stimulation of nerve impulses and is voluntary. |
| Classifications for Smooth Muscles | Is non-striated, composed of spindle-shaped cells; is found in the viscera, especially the stomoach, intestines, uniary ducts and blood vessels; contracts slowly in response to stimulation of nerve impulses and is in voluntary; and is involuntary. |
| Classifications for Cardiac Muscles | Is partially striated; specail muscle tissue found only in the heart; contract moderately fast in response of nerve impulses; and is involuntary. |
| Major functions of the muscles | assits in movement; produce heat and energy resulting from a complicated chemical reaction; assist in protection of internal organs; and assist in maintaining posture and balance. |
| Muscle attachements | Muscles are enclosed in the epimysium which is countinuous with the fibrous structures that attach muscles to bones or other structures. The muscles must be firmly attahced to the sturctures they pull on during contraction. Muscles may attach directly to the periosteum of the bones or may be attached by tendons or aponeuroses. When the epimysium extends in the form of a stong, tough cord of connective tissue which is continuous with the periosteum of the bone, it is called a tendon. When the epimysium extens as a broad, flat shet of connective tissure and attaches to the adjacent structure, it is known as aponeurosis. |
| Elasticity | the ability to resume former length when stretching force is removed. |
| Conductivity | the ability to transmit impulses |
| Contractility | the ability to contract or shorten and to thicken when a muscle shortens; it exerts pull. |
| Irritability | the ability to respond to stimuli |
| Extensibility | the ability to lengthen or stretch and hold |
| Action of the skeletal muscles | The contraction of skeletal muscles is caused by one of two wasy - response to a natural stimulus (motor nerve) or response to an artificial stimulus (electrical current); muscles move the body by pulling; muscles that move a part of the body usually lie proximal to the party they move; muscles act in groups; muscle cells get their energy to contract from simple sugars. |
| abdominal | broad thin muscles which support internal organs, assist in repiration. and assist in eliminatating waste from the large intestine and bladder. |
| chest | assist in respiration andmovements of the neck, arms, and trunk. |
| perineal | used in defecation and urination and form the floor of the pelvic cavity |
| head and face | control talking, chewing, swallowing, facial expressions, and blinking |
| back | large broad muscles attached to the vertebrae which allow body to bend, turn, and stand erect. |
Combine with other sets
Share on Facebook
Share on MySpace