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The official web site of the Department of Cell Biology and Physiology at University of North Carolina, U.S.A. is at: http://www.med.unc.edu/cellbiophysio In 2013 the department of Cell & Molecular Physiology (Physiology) combined with the Department of Cell Developemt & Biology (Anatomy). | |
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Cell & Molecular Physiology Imaging Gallery | |
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The background image shows the internal structure of a muscle fibre (which is a single cell):
- Myofibrils are the protein rods which slide past each other when a muscle contracts.
- Sarcoplasmic reticulum stores calcium ions and pumps it up in the process which ends contraction.
- Terminal cisternea are specialized regions of the sarcoplasmic reticulum which release calcium ions in order to cause contraction.
- Opening of the transverse tubules to the space outside of the muscle cell.
- Myoplasm is the surface membrane of the muscle cell.