In this video, we're going to begin our lesson on active transport. There are just two main types of active transport that you all should know, both requiring energy to transport molecules. This is because the molecules are going to be transported against their concentration gradients from areas of low concentration to areas of high concentration, and that's why it requires energy. Now, the first type of active transport you all should know is Primary Active Transport. Primary Active Transport is going to be directly driven by an energy source such as ATP hydrolysis, for instance. Primary Active Transport is directly linked to ATP. The second type of active transport that you all should know is Secondary Active Transport. Unlike Primary Active Transport, Secondary Active Transport is not driven directly by ATP hydrolysis; instead, it is driven by another molecule's concentration gradient. As we move forward in our course, we'll be able to talk more about both Primary Active Transport and Secondary Active Transport.

But let's take a look at our image down below, which shows a snippet of the map of the lesson on membrane transport. Here we're showing you Active Transport, which requires energy, so energy is required. Once again, there are two main types of active transport. The first is Primary Active Transport, which is driven directly by ATP. The second type of Active Transport is Secondary Active Transport, which is not driven directly by ATP; instead, Secondary Active Transport is driven by another molecule's concentration gradient. Here we're showing an image of one molecule powering the transport of another molecule against its concentration gradient.

Talk more details about Primary Active Transport and Secondary Active Transport. I'll see you guys in our next videos.