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What blocks the myosin binding sites on the actin molecule preventing cross bridge formation?
Wiki User
∙ 14y ago
The tropomyosin molecule blocks the active sites of the actin. Troponin is a molecule that is bound to the tropomyosin. Troponin needs CA+ (calcium ions) to bind to it in order to rotate the tropomyosin molecule and expose the actin molecules for the myosin heads to interact for muscle contraction.
Wiki User
∙ 14y ago
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Several things do. Neuromuscular-blocking drugs block neuromuscular transmission at the neuromuscular junction causing paralysis. Quaternary ammonium muscle relaxants are quaternary ammonium salts used as drugs for muscle relaxation, most commonly in anesthesia.When a muscle is in a resting state, actin and myosin are separated. To keep actin from binding to the active site on myosin, regulatory proteins block the molecular binding sites. Tropomyosin blocks myosin binding sites on actin molecules, preventing cross-bridge formation, which prevents contraction in a muscle without nervous input.Several things do. Neuromuscular-blocking drugs block neuromuscular transmission at the neuromuscular junction causing paralysis.Quaternary ammonium muscle relaxants are quaternary ammonium salts used as drugs for muscle relaxation, most commonly in anesthesia.Tropomyosin blocks myosin binding sites on actin molecules, preventing cross-bridge formation, which prevents contraction in a muscle without nervous input.
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What blocks the binding sites on actin?
TROPOMYOSIN MOLECULES ( troponin hold the tropomyosin in place)
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What are the building blocks of a polysaccharide molecule?
Monasaccharies bonded with glycocidic bonds.
