This chart describes the expected percentage of people who perform the job of Fitness Instructor that make less than that salary. For example 50% of the people who perform the job of Fitness Instructor are expected to make less than the median. Source: HR Reported data as of October 2015.
The structure of a cell membrane is designed to keep the internal contents of the cell intact, as well as keep unneeded materials out. The membrane is made up of a number of holes through which chemical processes and material exchanges take place.
Cell Membrane. 1  The cell membrane forms the outer boundary of the cell. 2  The cell membrane is composed of a double layer of lipid molecules in which proteins float.