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Muscular System
N/A
21
Anatomy
12th Grade
10/28/2011

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Cards

Term
Fracture
Definition
a break in the bone
Term
Sprain
Definition
an injury to the joints caused by overstretching
Term
Strain
Definition
an injury to the muscles caused by overstretching
Term
Cramp
Definition
a painful, involuntary muscle contraction; usually caused by fatigue or strain
Term
Striated
Definition
a type of muscle that connects to bone
Term
Smooth
Definition
a type of involuntary muscle that makes up the walls of various organs
Term
Cardiac
Definition
a type of muscle only found in the heart
Term
Sarcomere
Definition
basic unit of muscle contraction;segment between two neighboring Z-Lines
Term
Actin
Definition
a muscle protein; the major component of the I-band and helps compose the thin filaments
Term
Myosin
Definition
a muscle protein; the major component of the A-band and helps compose the thick filaments
Term
Myofibril
Definition
located within muscle cells; composed of thin actin and thick myosin filaments
Term
Muscle Contraction
Definition
when the sarcomere shortens and the Z-lines move closer together
Term
A-band
Definition
area where actin and myosin overlap
Term
I-band
Definition
small gap between the myosin and the Z-band at the end of the sarcomere
Term
Z-line
Definition
proteins that link sarcomeres together
Term
ATP
Definition
energy source for muscle contraction and relaxation
Term
Calcium
Definition
trigger for muscle contraction
Term
Superficial Muscles
Definition
muscles that are located in the layer closest to the skin
Term
Muscle
Definition
a tissue that has the ability to contract to help with movement
Term
Involuntary
Definition
a type of muscle that contracts without conscious control
Term
Voluntary
Definition
a type of muscle that is controlled by the individual, such as the striated muscle
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