Category: M
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MyPyramid
USDA introduced MyPyramid in 2005 to replace the 1992 Food Guide Pyramid. It offers a more individualized and interactive approach for improving diet and lifestyle by incorporating recommendations from the Dietary Guidelines for Americans.
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Myosin filament
One of the thick contractile myofilaments in a myofibril.
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Myofibrils
Protein filaments that bundled together make the fibers that bundled together make muscles. The longitudinally arranged contractile elements, composed of actin and myosin of a skeletal muscle. Contractile organelles composed of myofilaments. A long thread of striated muscle fibre. One of many contractile filaments that make up a fiber of a striated muscle. One of…
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Musculoskeletal disorders
Any problem dealing with the muscles, tendons, ligaments, bones, or joints.
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Muscular system
Comprised of skeletal, visceral, and cardiac muscle tissue. There are more than 600 muscles in the human body. The muscles in the body, usually applied only to striated muscles. The more than 600 muscles that are attached to and supported by the bones of the skeleton. These muscles shorten or lengthen to move the bones…
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Muscular strength
The maximum force that can be exerted by a muscle or muscle group against a resistance. Ability of the muscle to generate the maximum amount of force. The ability to contract skeletal muscles to engage in work. Muscular strength is the ability of a muscle to exert one maximal force against resistance. The capacity of…
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Muscular endurance
The capacity of a muscle to exert force repeatedly or to hold a fixed or static contraction over time. The ability to perform repetitive work over a prolonged period of time. The ability’ of a muscle or muscle group to repeatedly exert force against a resistance. Ability of the muscle to perform repetitive contractions over…
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Muscular dystrophy (MD)
An inherited disorder that affects skeletal muscle structures when muscle cells are progressively destroyed and replaced with fat tissue. A genetic disease caused by a defect in the X chromosome; first recognized by G. A. B. Duchenne in 1858. Afflicts males almost exclusively because males have only one X chromosome, whereas females inherit two copies…
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Muscular conditioning
A segment of class designed to isolated specific muscle groups in order to promote strength or endurance through resistance training.
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Muscle spindle
A sensory organ in the muscle that relays information about length and speed of stretch to the central nervous system. A type of receptor, located among the fibers of a skeletal muscle that responds to muscle contraction (stretch). One of the sensory receptors which lie along striated muscle fibres. A specialized receptor, sensitive to stretch,…