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Review of Terminology (the “ sarco- ” words)  ,[object Object],[object Object],[object Object],[object Object]
Sarcomere Sarcolemma Sarcoplasmic  Reticulum A similar picture can be found on  page 169 of the  reading packet, figure 8.4. * Note that the  sarcoplasmic reticulum  “surrounds” each myofibril. * Also note that the  sarcoplasmic reticulum  seems to form  repeating units that “surround” individual  sarcomeres . Z-line Z-line
Review of Terminology (the “myo-” words) ,[object Object],[object Object],[object Object]
sarcomere Myofibril *  Note that a  sarcomere  is a repeating unit of contraction within the myofibril. * The myofibril can be seen to  be made up of repeating units of overlapping  myofilaments .
Myofilaments ,[object Object],[object Object],[object Object],[object Object],[object Object],sarcomere sarcomere lengthened shortened
New Terminology ,[object Object],[object Object]
Skeletal Muscle Fiber (Myocyte) sarcoplasmic reticulum   (the “blue” tubes)   T-tubules   (the “purple” tubes) Myofibril A similar picture can be found on  page 169 of the  reading packet, figure 8.4. Sarcolemma
Motor Unit (page 170; figure 8.6) ,[object Object],[object Object],[object Object],[object Object]
Neuromuscular Junction (page 170; figure 8.5) ,[object Object],[object Object],Signal from brain Motor  end  plate
Axon branch of motor neuron Motor End Plate Neuromuscular Junction
Our Goals !! ,[object Object],[object Object],[object Object]

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Review motor end plate nmj notes

  • 1.
  • 2. Sarcomere Sarcolemma Sarcoplasmic Reticulum A similar picture can be found on page 169 of the reading packet, figure 8.4. * Note that the sarcoplasmic reticulum “surrounds” each myofibril. * Also note that the sarcoplasmic reticulum seems to form repeating units that “surround” individual sarcomeres . Z-line Z-line
  • 3.
  • 4. sarcomere Myofibril * Note that a sarcomere is a repeating unit of contraction within the myofibril. * The myofibril can be seen to be made up of repeating units of overlapping myofilaments .
  • 5.
  • 6.
  • 7. Skeletal Muscle Fiber (Myocyte) sarcoplasmic reticulum (the “blue” tubes) T-tubules (the “purple” tubes) Myofibril A similar picture can be found on page 169 of the reading packet, figure 8.4. Sarcolemma
  • 8.
  • 9.
  • 10. Axon branch of motor neuron Motor End Plate Neuromuscular Junction
  • 11.