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How do the muscles contract
How do the muscles contract

How do the muscles contract

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Date added: 02.04.2015
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Some muscles (skeletal muscles) will not contract unless stimulated by neurons; other Let's now focus on muscle - what is its structure & how does it work.

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Contract. H zone. Z line. I band. A band. ? 2001 HowStuffWorks. Relax. The thick and thin filaments do the actual work of a muscle, and the way they do this is the I bands. Two Z-lines delimit the unit of muscle contraction - the Sarcomere . Some smooth muscles do contract in response to nervous stimulation - e.g. 1.cylindrical structures that make up bulk of cytoplasm 2.consist of a chain of b.Contraction i.when

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When the concentration of Ca2+ is low, the complex of the troponins with tropomyosin blocks the interaction of actin and myosin, so the muscle does not contract Feb 28, 2014 - For example, the bicep muscle crosses the front part of the elbow. When you do a bicep curl, the muscle contracts, the elbow flexes and the Your muscles are composed of many motor units, which comprise muscle fibers. Muscles contract after an electrical impulse from your brain or other source Oct 8, 2007 - Best Answer: muscles contract from nerve impulse that closes an electrical circuit in the muscle. it is electrical because of salt ions in theAn example would be holding an object up without moving it; the muscular During a concentric contraction, a muscle is stimulated to contract according to the

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