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The Muscle System
Properties, functions, characteristics, locations, and definitions.
30
Physiology
12th Grade
02/07/2010

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Term
Spimysium
Definition
The fibrous sheath arounf an entire skeletal muscle.
Term
Perimysium
Definition
The sheath of connective tissue enveloping bundles of muscle fibers.
Term
Endomysium
Definition
The connective tissue layer surrounding an individual skeletal muscle.
Term
Fascicle
Definition
A small bundle of fibers.
Term
Fascia
Definition
Asheet of fibrous connective tissue enveloping, separating, or binding together muscles, organs, and other soft structures.
Term
Sarcolemma
Definition
Cell membrane of a muscle cell.
Term
Myofibrils
Definition
Cylindrical organelles found in muscle cells.
Term
Muscle fibrils
Definition
A small fiber or filament.
Term
Muscle fiber
Definition
A cell composed of numerous myofibrils that contract when stimulated.
Term
Sarcoplasmic reticulum
Definition
Physically seperate from the sarcolemma and surrounds each myofibril.
Term
Trapomyosin
Definition
Actin-binding protien that regulates actin mechanics.
Term
Myofilament
Definition
Chains of actin and myosin that pack a muscle.
Term
Actin
Definition
A protein that functions in the contractile system of skeletal muscle.
Term
Myosin
Definition
A large family of meter proteins found in eukaryotic tissues.
Term
Saccromere
Definition
Contractile unit of a myofibril.
Term
Troponin
Definition
A protein in skeletal and cardiac muscle.
Term
Three types of Muscles
Definition
Skeletal, Cardiac, and Smooth.
Term
Properties of Skeletal muscle
Definition
Made of striated muscle tissue, voluntary control, attached to bones.
Term
Properties of Cardiac muscle
Definition
Striated muscle, involuntary, and found in heart.
Term
Properties of Smooth muscle
Definition
Smooth muscle tissue, involuntary, and found in internal organs.
Term
Five functions of muscles
Definition
Movement, maintence of posture, heat production, stabilize joints, protection
Term
Four characteristics of muscle
Definition
Contractility, excitability, extensibility, and elasticity
Term
Excitability
Definition
Muscle responds to nerve and hormone stimulation.
Term
Contractility
Definition
Muscles can contract.
Term
Extensibility
Definition
Muscles can be stretched.
Term
Elasticity
Definition
If muscles are stretched they recoil to their original length.
Term
What type of muscle is found in heart muscles?
Definition
Cardiac muscle
Term
What type of muscle is found in internal organs?
Definition
Smooth muscle
Term
What type of muscle is found all through the body?
Definition
Skeletal muscle
Term
Acronym for functions
Definition
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