We saw in Chapter 15 that a voltage gradient, also called an electric potential, exists across the plasma membrane of all cells. The potential across the plasma membrane of large cells can be measured with a microelectrode inserted inside the cell and a reference electrode placed in the extracellular fluid.
A production company is responsible for the development and filming of a specific production or media broadcast. In entertainment, the production process begins with the development of a specific project.
A producer can be: 1  anyone who brings the project to fruition. 2  the person[s] who actually physically produce[s] the project [i.e., guide through pre-production, on set to handle the day-to-day, there during post-production, etc.] 3  someone who holds the rights to the underlying property.