Sarcoplasmic Reticulum within Cardiac Muscle Cells

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Created by
Hiri P

Cards (2)

  • Sarcoplasmic Reticulum within Cardiac Muscle Cells:
    • the sarcoplasmic reticulum is a network of membranous tubules lying around the myofibrils that make up the muscle fibres and lying underneath the sarcolemma
    • has 3 functions
    • store calcium
    • release calcium so that it can bind with troponin so that it can facilitate cross bridge formation and facilitate force production
    • restores calcium at the end of a contraction ready to rerelease it next time an action potential arrives
    A) sarcoplasmic reticulum
  • Sarcoplasmic Reticulum within Cardiac Muscle Cells:
    • in skeletal muscle, the sarcoplasmic reticulum releases 100% of calcium needed for muscle contraction
    • whereas in cardiac muscle the sarcoplasmic reticulum only releases 80% of the necessary calcium needed for the cardiac muscle to contract
    • so there is a different system to provide adequate calcium in cardiac muscle called calcium induced calcium release
    A) sarcoplasmic reticulum