Training. According to the American Physical Therapy Association, there were more than 200 accredited physical therapy programs in 2013. Master of Physical Therapy or Master of Science in Physical Therapy degrees are no longer offered in the U.S., and PTs in training now receive a Doctor of Physical Therapy degree.
Cell Membrane. The cell membrane (plasma membrane) is a thin semi-permeable membrane that surrounds the cytoplasm of a cell. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell, while keeping other substances out.
Cell Membrane Structure. The cell membrane is primarily composed of a mix of proteins and lipids. Depending on the membraneâs location and role in the body, lipids can make up anywhere from 20 to 80 percent of the membrane, with the remainder being proteins.t also serves as a base of attachment for the cytoskeleton in some organisms and the cell wall in others. Thus the cell membrane also serves to help support the cell and help maintain its shape. Animal cells, plant cells, prokaryotic cells, and fungal cells have cell membranes.