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.
A cell membrane is also known as a plasma membrane or cytoplasmic membrane. The cell membrane separates the interior of a cell from its outside environment. The main function of a cell membrane is to protect the cell from its surroundings.