1 / 8

Microscopic Anatomy of Skeletal Muscle

Microscopic Anatomy of Skeletal Muscle. Lab Week of February 25, 2008 Marieb & Mitchell: Exercise 14. Muscle Fibers. multinucleate nuclei in peripheral area myofibrils I and A bands myofilaments actin & myosin. Sarcomere. Z to Z M line in middle

jescie-thompson
Télécharger la présentation

Microscopic Anatomy of Skeletal Muscle

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Microscopic Anatomy of Skeletal Muscle Lab Week of February 25, 2008 Marieb & Mitchell: Exercise 14

  2. Muscle Fibers • multinucleate • nuclei in peripheral area • myofibrils • I and A bands • myofilaments • actin & myosin

  3. Sarcomere • Z to Z • M line in middle • thick and thin filaments overlap and interact to contract the myofibril

  4. SR, T tubules and Triads • At the junction of A and I, the sarcolemma indents to form the T tubule • Sarcoplasmic Reticulum (SR) like smooth ER in most cells • terminal cisternae: SR next to T tubules • Triads (terminal cisternae – T tubule – terminal cisternae)

  5. Fiber to Muscle Organization • muscle fiber • endomysium • perimysium • fascicle • epimysium • skeletal muscle • deep fascia • tendons or aponeuroses

  6. Activity 1 • Model of Muscle Cell • Look at fresh chicken muscle under microscope • Look at slide with cross section of skeletal muscle and locate the structures in Fig 14.4 (if visible) Activity 2

  7. The Neuromuscular Junction • axon • axon terminal • motor unit • 1 neuron and all the muscles it stimulates • Plate 4, pg 693

  8. Activity 3 • Model of skeletal muscle cell with NMJ? • Slide with motor unit • axon fibers • axon terminal • COMPARE WITH PLATE 4 on pg 693

More Related