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7. Having begun and enjoyed resistance training, Emily is looking at ways that she can get...

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Medical Sciences

7. Having begun and enjoyed resistance training, Emily islooking at ways that she can get stronger. Describe the factorsthat increase the force of muscle contraction .

8. List and compare the three different types of muscle .

9. Describe the events that occur at the neuromuscular junctionthat result in a muscle contraction .

Answer & Explanation Solved by verified expert
3.8 Ratings (659 Votes)
Muscle cell structureCharacteristicsSarcolemmaServes as the cell membraneHas membrane invaginationsIn striated muscle cells transverse tubules TtubulesTransmit the action potential AP to sarcoplasmic reticulumsee belowThe close proximity of Ttubules to adjacent terminal cisternaeallows direct transmission of APs to the sarcoplasmic reticulumwhich enables a quick release of Ca2 for contractionResponsible for synchronization of AP transmission andcontractionIn smooth muscle cells caveolaeSarcoplasmServes as the cytoplasm of striated muscle cellsNotable contentsMyofibrils consisting of myofilamentsGlycosomes granules of stored glycogenMyoglobinCa2 to initiate contraction by binding troponinSarcoplasmic reticulum SRServes as the endoplasmic reticulumStores calcium that needs to be released into the sarcoplasmfor contractionConsists of a network of longitudinal tubules LtubulesIn skeletal muscle Ltubules extend longitudinally into theterminal cisternae which encircle myofibrils and lie adjacent toTtubulesMyofilamentsProtein fibers consisting of    See Answer
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