For my second Youtube video review I decided to pick a video using the opposite reasoning that was used to select my video for the first review. This time, rather than choose a topic that challenged me, i opted to go with a topic that I was well versed in and that it carbohydrates. The logic behind my choice of topic was that I would be able to access whether or not the information was useful and accurate.
Video title: Carbohydrates.
Youtube channel: Bozeman Biology.
Main points of the video:
Carbohydrates provide energy as well as structure (example cellulose in plants or chitin in the exoskeleton of an insect which is also the building block of fungi.)
1 sugar molecule= a monosaccharide
2 sugar molecules= a disaccharide
3-10 sugar molecules= an oligosaccharide.
Many sugar molecules linked together= a polysaccharide.
Empirical formula of all carbohydrates are the same: CH20 (ratio 1:2:1)
Glucose is the simplest sugar (6 Carbon) A lot of hydroxyl groups which makes it soluble in water. This is why it is utilized in the following:
b. produced by plants in photosynthesis.
Fructose: 5 sided sugar, sweeter than glucose. Found in fruit and corn syrup.
Galactose: A little less sweet than glucose.
Glucose, fructose and Galactose are the 3 basic monosaccharides. They all can be moved through our blood.
Sucrose/ table sugar(a disaccharide) = Glucose + Fructose (both monosaccharides)
Sucrose must be broken down to it’s monosaccharides by sucrose before it can be used by the body.
Lactose= Glucose + Galactose.
Lactose broken down by lactase.
Lactose intolerance: Condition whereby a person lacks the enzyme lactase which leads to an irritation in the gut due to the fact that lactose cannot be broken down into its respective monosaccharides.
Lactose intolerance/tolerance is naturally selected.
Important in the production of glycoproteins.
Fun fact: carrots have to be cooked for an hour for the body to be able to obtain the sugar from it.
Eg: starch (hundreds of glucose molecules linked together)
can be found in potatoes.
Is the storage molecule of plants.
A macromolecule with thousands of glucose molecules.
The storage molecule of animals.
Stored in the liver.
Hydrogen cross bonds make it very durable.
Humans won’t have the enzymes to break it down in the gut. Bacteria in the gut of cows will help to break them down into sugars.
The breaking of sugars with the addition of water.
Losing a water molecule and forming a covalent bond between two monosaccharides.
Evolutionary Importance of sugar:
Sugar is an indicator of fruit and fruits contain other important nutrients needed by the human body. This is why humans are “programmed” to love sugar. However, too much sugar in the diet is now leading to an increase in heart disease and diabetes
My thoughts on this video: Once again I have randomly chosen a video that exceeds my expectations in a positive way.
Pros of this video:
1. The Youtube uploader Paul Andersen teaches science at Bozeman High School in Bozeman, MT. He is also the 2011 Montana Teacher of the Year. These credential speak volumes to me. They assure me that the information I am receiving is very much accurate, reliable and specifically targeted towards students like myself.
2. The format of the video was very professional and well edited. I enjoyed that I could see the teacher in a smaller screen while he spoke and explained the concepts on the slides. This creates a classroom experience with out being in a classroom and made me feel like I was having a one on one class with the teacher.
3. Mr. Anderson spoke with simple language that was easy to understand and was able to break down complex terms in a way in which they could be easily comprehended.
4. I admire the use of pictures as well as chemical structures of what ever he was speaking about. Its easier to learn something by seeing it. These figure will also play a role in remembering material since the brain is likely to associate facts with specific pictures.
5. The duration of the video was perfect, not too long, not too short. I was very impressed at the amount of material covered in the space of time and how he was able to explain things a such a manageable pace.
6. I loved that I actually learnt something new in this video despite covering the topic in school already. I learnt that latose intolerance was naturally selected. He explains that if our ancestors raised cattle they were more likely to continue drinking milk through out their life and on the other hand if they didn’t that it would be unlikely for them to drink milk regularly in their adulthood and as such lactase would not function the same. I also enjoyed learning about the evolutionary importance of carbohydrates.
Cons: As with my previous video review, I honestly have no negative reviews or improvements for this video. I think it is fantastic just the way it is and I am really glad that I found this channel, I’m sure it will come in handy during my study sessions.
Conclusion: Paul Andersen presented information on carbohydrates with the flair of an experienced educator. Any one will be able to understand these biochemistry related concepts with his explanations. I recommend these videos to any student who wants a clear and concise breakdown on carbohydrates. If I were to rate this video I would give it 5 out of 5 stars 🙂