in this video, we're going to begin our introduction to try Aysal glycerol ALS. Now, before we get started, I first want to point out that over here we have a modified version of our original lipid map. But you can still see that the lipids are branching off into two major groups which are the fatty acids, and the ISO preens over here on the right. But again, we're going to cover the ISO preens much later in our course after we finish covering all of the fatty acids and all of the fatty acid based lip, it's. And so now that we finished talking about fatty acids, we're finally going to transition into our first class of fatty acid based lipids, which are the glitz, aurora lipids and so glycerol Lipids are literally defined as lipids with fatty acid chains that are linked to a glittery all molecule. And so notice down below. Over here on the left hand side, we're showing you the structure of a glycerol molecule so we can go ahead and label it as glycerol. And of course, the glitz, Arrgh prefix and glycerol lipids indicates that a glycerol molecule is going to be in its structure. And these are lipids with glycerol. And because they are branching from the fatty acids, we know that fatty acids are going to be found in their structures. Now moving forward from this point, we're going to talk about two different classes of glycerol a lip. It's the first class are going to be the try Aysal glycerol. And so we'll introduce the try. Essel Glycerol is here in our next lesson video, so I'll see you guys there.
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So now that we've introduced glycerol lipids in this video, we're going to talk about the first type of glycerol lipid, the try Aysal, glycerol. And so, taking a look at our map here, we can see that the glycerol lipids fall right here in this position. So they are indeed fatty acid based lipids and then branching off of the glittery lipids. We have the try Essel, glycerol, ALS, and you can see the word glycerol itself embedded within the word try Aysal glycerol. So we know it's going to have a glycerol molecule and be considered a glycerol Lippett. Now, when it comes down to it, try Hazel glycerol czar, also known as triglycerides. And so you may see that your textbook or your professors will use tricycle, glycerol and triglycerides interchangeably with each other. And these try Essel glycerol, as the name implies with the try. These air just lipids with three fatty acid chains linked to a single glycerol molecule. And so again, the prefix try here is just referring to the three fatty acid chains that air linked. Now these three fatty acid chains that are linked to this single glycerol molecule are going to be linked via ester linkages. And these ester linkages are formed by dehydration synthesis reactions. And we can see all of this down below in our image in this first box that we see over here. And so notice that this molecule that we see over here on the far left is our glycerol molecule, and so we can go ahead and label it as glycerol. And then over here, what we have are three fatty acid chains and noticed that these fatty acid chains are variable or they can be variable. And so here we have a shorter fatty acid. Here we have a longer fatty acid, and then here we have an unsaturated fatty acids. And so these three fatty acids can be linked to the glycerol molecule here via a dehydration synthesis reactions, uh, where a water where water molecules can be released and in the process, it links the glycerol molecules here to the fatty acid chains, and it links them via these ester linkages, which we have boxed here in blue. And again, This is exactly what we described up above in our text. Now what's important to note is that the fatty acid chains of triglycerides can either be identical to each other or they can be different from each other. Notice again that in our example here we had three fatty acids that were different from each other. However, they can be identical to each other as well. Now, if the tricycle glycerol contains three identical fatty acids, then these air referred to as simple. Try a soulless Charles. However, if the fatty if the trace of glycerol contains a mixture of different fatty acids, then they're called mixed trace of bliss a rolls, and so we can see that over here in our image as well. Notice that in this box we have simple try. So glycerol right here because we have three identical fatty acid chains linked to the glycerol molecule. And then over here on the right, what we have is mixed tricycle glycerol because notice that there is a mixture of fatty acid chains, these two maybe identical. But this one over here is not identical, and so collectively they're referred to a za mixed group. And then last but not least, what I wanna leave you guys off with is that sometimes these fatty acid chains that we see here they're just referred to as chains. And so you can think of chains branching off of the glycerol molecule. And other times these fatty acids are referred to as tales. And so you can think of the tales here branching off of the glycerol molecule and so you'll see interchangeably, Um, that I will use change and tails, uh, to refer to these fatty acid chains, and your professors and textbooks will also do the same. And that is some common, um, use of vocabulary to refer to these fatty acid chains. And so this here concludes, our introduction to try Essel glycerol is, And in our next lesson, video will be able to talk about the function of these. Try s a legless roles before we actually transition into the next group of glycerol lipids. And so again, that concludes this video. And I'll see you guys in our next one
What type of bond connects the fatty acid chains to the #1, #2, and #3 positions of glycerol in triacylglycerols?
Draw the structure of a triacylglycerol that contains all 18:0 fatty acids. Is this a simple or mixed triacylglycerol?
a) Simple triacylglycerol.
b) Mixed triacylglycerol.
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in this video, we're going to talk about some of the functions of tricycle glycerol now try So glycerol is primarily function in long term storage of fatty acids. And as you'll see down below in our image, when it comes to fatty acids, storage fatty acids are almost never stored as free individual fatty acids like what we see over here instead, the fatty acids. When it comes to their storage, they're going to be stored as try Aysal. Glycerol is like what we see over here, and the fatty acids themselves can actually be completely oxidized to provide even Mawr energy per unit mass than carbo hydrates. And so, when these fatty acids are stored, as try is a legless roles the tricycle glycerol zehr really acting as long term energy storage molecules. And so they're acting practically as these batteries because batteries can provide long term energy. And so another function of tricycle glycerol is that they can also serve as thermal insulators under our skin to help maintain body temperatures. And so what you'll notice is in our image down below. We have this skinny figure over here, and then we have this bigger figure over here. And this skinny figure is asking, Aren't you cold? And the bigger figure who's clearly gonna have a lot more tricycle cholesterols? It's saying Nope. And so, by having the extra tricycle glycerol underneath of your skin that can help maintain body temperatures and help keep your body warm. Now the specialized cells that synthesize and store tricycle glycerol are called adipose sites, and out of adipose sites are also known as fat cells. And so, over here, what you can see is we have this scanning micrografx of adipose sites, and the's big white blots that you see within these cells are really just, uh, the try is a legless roles and where they're being stored within the cells. And so this here concludes our introduction to try so glycerol functions, and we'll be able to get some practice applying these concepts and some of our next video. So I'll see you guys there
The function(s) of triacylglycerols in animals include: