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.
Or, in the case of the cell, some chemical energy. Active transport is transport against a concentration gradient that requires chemical energy. Active transport moves ions or molecules in a specific direction through the use of an integral membrane protein. Think of these like different gates at the fair.