There are probably many opinions about what makes a relationship work...being in love with someone gets the ball rolling, but it's said that love is what keeps it moving. I have discovered that in order to have a successful happy relationship, you have to have a little of both.
There are three main types of Active Transport: The Sodium-Potassium pump, Exocytosis, and Endocytosis. The Sodium-Potassium Pump is a structure known as a cell-membrane pump that uses energy to transport Sodium and Potassium ions in and out of the cell.
Active transport is defined as the movement of solute against an electrochemical gradient; therefore, by definition, it is an endergonic process that requires the coupled input of energy. Active transport is costly to the cell in terms of energy, however, it allows a cell to carry out many essential processes.