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Muscular System
n/a
21
Anatomy
Undergraduate 2
03/10/2009

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Term
Skeletal Muscle tissue
Definition
this type of muscle is attached to bones for movement; it has long, cynlindircal cells, multinucleated, and striated. Its control is voluntary
Term
Cardiac Muscle
Definition
this type of muscle is the muscle of the heart. It has short branching cells, mononucleated, faintly striated and forms functional syncytia. Its function is involuntary myogenic.
Term
Single Unit Smooth muscle
Definition
cells connected to function as a single unit (syncytium) this type of muscle is found in the GI, respiratory, and genitourinary tract mucous membranes. It has small oblong cells, it is mononucleated, and it also may form a functional synctium. Its control is involuntary myogenic.
Term
Multi-unit smooth muscle
Definition
cells grouped together into many contractile units controlled by the nervous system. This type of muscle is found in blood vessel walls. It has small oblong cells, it is mononucleated, and it also may form a functional syncytium. It's control is involuntary myogenic.
Term
A Bands
Definition
(anisotropic)dark striations
Term
I Bands
Definition
(isotropic)light areas between striations
Term
syncytium
Definition
a network
Term
tendons
Definition
attach muscle to bone
Term
aponeuroses
Definition
broad, flat, tendinous attachment
Term
origin
Definition
more fixed point of attachment
Term
insertion
Definition
more movable point of attachment
Term
Agonist
Definition
(on center movement) the prime mover; the muscle which performs the movement in question
Term
Antagonist
Definition
(off center movement) the muscle that performs the opposing movement to that of the agonist.
Term
Synergists
Definition
muscles which work together to perform a movement; often differs from the movement either performs when working alone.
Term
Fixators
Definition
preventing a movement; muscles with work to keep a part from moving; stabiliazers,neutralizers.
Term
whole muscle
Definition
composed of bundles of cells called fasiculi
Term
Myofibrils
Definition
Each muscle fiber contains these which run parallel to its length. These components contain the contractile elements of skeletal muscle cells.
Term
endomysium
Definition
each individual muscle fiber is surrounded by a fine sheath of connective tissue consisting of areolar and reticular fibers.
Term
perimysium
Definition
within in each skeletal muscle, the endomysium-wrapped muscle fibers are grouped into fascicles that resemble bundles of sticks. Surrounding each fascicle is a layer of fibrous connective tissue called...
Term
epimysium
Definition
an "overcoat" of dense irregular connective tissue surroundes the whole muscle. This coat has a name that means "outside the muscle".
Term
striations
Definition
repeating series of dark A bands and light I bands.
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