Unit 3 All slides - The Somatic Motor System Muscles:...

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The Somatic Motor System Muscles: Skeletal Smooth (enteric-vascular) Cardiac and their innervation
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Troponin Calcium Myosin head Tropomyosin ATP
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Calcium Ion nears troponin Calcium binds troponin which moves exposing site
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Calcium binds troponin which moves exposing site Magnesium binds myosin ATP is cleaved
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Magnesium binds myosin ATP is cleaved Magnesium and ADP leave myosin head changes conformation
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Motor Unit 1 Motor Unit 2
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Temporal Summation Tetanus “Twitch”
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Troponin Calcium Myosin head Tropomyosin ATP
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ATP General stores: a few contractions Creatine Phosphate: 15 seconds
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ATP General stores: a few contractions Creatine Phosphate: 15 seconds Glycogen: 1 - 60 minutes ( anaerobic vs aerobic ) Aerobic respiration: blood sugar + myoglobin
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Troponin Calcium Myosin head Tropomyosin ATP
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Transverse Tubule Sarcoplasmic Reticulum Di - hydropyidine Receptor ( DHPR ) Ryanodine Receptor ( voltage - gated ) ( mechanically - gated )
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The Somatic Motor System Information from the CNS to the PNS
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The Somatic Motor System Muscles: Skeletal Smooth (enteric-vascular) Cardiac and their innervation
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Motor Unit 1 Motor Unit 2 Inervation
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Troponin Calcium Myosin head Tropomyosin ATP
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Muscle Contraction
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Striated Smooth Cardiac multi - nuclear ( syncitium ) mono - cellular mono - cellular Sarcoplasmic Reticulum ER Organised sarcomeres Unorganised sarcomeres Organised sarcomeres Sarcoplasmic Reticulum ( sparse ) *
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Striated Smooth Cardiac
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Unit 3 All slides - The Somatic Motor System Muscles:...

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