Skeletal Muscle Fiber Anatomy
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Questions and Answers

What is the functional contractile unit of a myofibril?

  • A-band
  • Sarcomere (correct)
  • I-band
  • Z-line
  • Which organelle is abundantly found in the sarcoplasm of skeletal muscle fibers?

  • Lysosomes
  • Centrioles
  • Golgi apparatus
  • Smooth endoplasmic reticulum (correct)
  • What gives rise to the dark areas known as Cohnheim's areas in the sarcoplasm?

  • Glycogen granules
  • Ribosomes
  • Mitochondria
  • Myofibrils (correct)
  • Which component of the myofibril is responsible for the cross striation seen by light microscopy?

    <p>Dark band (A-band)</p> Signup and view all the answers

    What type of muscle fiber is described as having peripherally situated nuclei?

    <p>Skeletal muscle fiber</p> Signup and view all the answers

    Which pigment is commonly found in the sarcoplasm of skeletal muscle fibers?

    <p>Myoglobin</p> Signup and view all the answers

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