In this video, we're going to introduce our map of the lesson on membrane transport, which is down below right here. Notice that at the very top of this map, it is titled membrane transport, and membrane transport can really be broken up into 2 major categories, which is why we have these two branches coming off of the membrane transport. Membrane transport can be broken up into molecular transport, which is really just going to be the transport of relatively small molecules across the membrane, and then it can also be broken up into bulk transport, which is going to be the transport of relatively large molecules across the membrane.

Now, because this is our map of the lesson, you can use this image as a map or a table of contents to figure out what topics we're going to cover next and to figure out where you are within the lesson as you move forward in the course. We're going to be exploring the leftmost branches first. So we'll start off by exploring molecular transport, distinguishing passive transport, which is no energy, from active transport, which requires energy. And then we'll explore the leftmost branches first. So we'll talk about osmosis, simple diffusion, facilitated diffusion including carriers and transporters, and proteins and channels, and then after we explore the leftmost branches, we'll zoom back out and explore the right branches.

So we'll talk more about active transport, distinguishing between primary active transport and secondary active transport, and then after we explore these branches, of course, we'll zoom back out and explore the right branches, so we'll talk more about bulk transport of larger molecules, including endocytosis, such as phagocytosis - cellular eating, and pinocytosis - cellular drinking, and of course, another type of pinocytosis, which is receptor-mediated endocytosis. And then after we explore these, of course, we'll zoom back out and explore exocytosis.

That is really the plan that we have moving forward in our course. Again, you should be referring back to this image as we move forward to figure out what topics we're going to be covering next and to figure out where you are within the lesson. That being said, this here concludes our brief introduction to our map of the lesson on membrane transport, and I'll see you all in our next video to talk more about molecular transport and distinguish between passive transport and active transport. I'll see you all there.