BIOL 2401 Practical 3 Vocabulary
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| Muscle Fiber | show 🗑
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| show | Plasma membrane of a muscle fiber.
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| show | Extensions of sarcolemma that penetrate deep into the muscle fiber enable action potential to penetrate interior of muscle cell.
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| Nuclei | show 🗑
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| show | The cytoplasm of a muscle fiber.
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| show | Endoplasmic reticulum of muscle; stores Calcium.
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| show | Enlarged end regions of sarcoplasmic reticulum.
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| show | One T tubule with terminal cisternae on each side.
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| show | Bundles of myofilaments surrounded by T tubules and sarcoplasmic reticulum.
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| Myofilaments | show 🗑
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| Actin | show 🗑
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| show | Covers actin binding sites so myosin heads cannot bind.
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| show | Binds calcium during muscle contraction and pulls tropomyosin off acting filaments so myosin heads can bind to actin.
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| show | Thick filament in muscle contractions.
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| show | Bind to actin.
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| Sarcomere | show 🗑
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| show | Anchors the acting filaments.
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| M Line | show 🗑
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| A Band | show 🗑
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| I Band | show 🗑
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| Neuromuscular Junction | show 🗑
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| show | Specific region where synaptic terminal of a motor neuron synapses with one muscle fiber.
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| Motor Unit | show 🗑
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| Epimysium | show 🗑
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| Perimysium | show 🗑
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| Endomysium | show 🗑
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