We like to pin clarifications in our video! So at 4:47, while we- and many biology sources that you may use - mention the ATP bond breakdown as an energy releasing event, this can lead to a misconception if just isolating the phosphate bond breaking alone. This is because bond breaking requires energy to be absorbed while bond creating releases energy. When we say that when the phosphate bond in ATP breaking down (ATP hydrolysis) releases energy, we wish we had been more clear that this involves many events, including the breaking and reforming of bonds. We should clarify the entire ATP hydrolysis process itself is considered an energy releasing, exergonic process. Our more recent ATP video here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-23ZzI6WZS28.html did a better job with clarifying that. Also, in case you're looking for more detail about the cell membrane itself---not just transport---we have a video called "Inside the Membrane" that you may want to check out: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-qBCVVszQQNs.html You can see our ENTIRE biology playlist here: ru-vid.com/group/PLwL0Myd7Dk1F0iQPGrjehze3eDpco1eVz UPDATE: We have videos dubbed in Spanish and Portuguese using an artificial voice via aloud.area120.google.com to increase accessibility. See our Amoeba Sisters en Español channel ru-vid.com/show-UC1Njo3LBy53cOPngz6ArV8Q and Amoeba Sisters em Português ru-vid.com/show-UCYTQPX2X_mXe0ZMPi0fXxbg Want to help translate our subtitles in any language? Learn more here www.amoebasisters.com/pinkys-ed-tech-favorites/community-contributed-subtitles
i know right and then there are some teachers who think tht students are dump and when ever we ask a question he makes us feel more dump of not knowing it wht the heck!!!!
they're right though, people who take the time to make this really do care about spreading information, in my bio class everyone except 2 people who had already taken the class failed the quiz, and she blamed us claiming her teaching was enough to pass. Plus she doesn't do anything until a giant 45-minute lecture the day before the assessment. Resort to RU-vid to get the job done.
The problem is they teach as if you already know the material.Because they know the material and have a mind for it they think everyone does.Im not interested in being à doctor or médical student I'm doing physical therapy but this is one of the requirements.I get needing to be familiar but this is overkill
Im not going to lie I'm studying for the MCAT and when I get exhausted from studying I just watch these videos as they are cute, funny, and are pretty good supplement to the material I'm learning/reviewing.
we have same subjects in Arabic , but your videos really help me to save informations easier , faster and with a lot of FUN! and you help me to improve English language too .. so THANK YOU A LOT may God bless you
I am a master student in chemistry getting exposed now to more biological aspects that requires a great deal of biology basics and u make it really easy and fun to remember these things after those many years. Thanks for your unique creativity and please keep it up cause education needs ppl like you are.
0:40 To keep a stable environment or homeostasis, cells must have some control over what goes in and what goes out of them. A very important structure that all cells contain is the cell membrane which helps regulate homeostasis by controlling what goes in and out. 1:14 The cell membrane has signaling abilities. It's made of a phospholipid bilayer (two layers of lipids). These lipids have a polar hydrophilic water-loving (polar molecules have unequal sharing of electrons among atoms) head and a hydrophobic water disliking tail that's nonpolar (nonpolar molecules have equal sharing of electrons among atoms) made of two fatty acid tails. 1:38 Some molecules have no problem going through the cell membrane and go directly through the phospholipid bilayer. Small nonpolar molecules such as oxygen, carbon dioxide gas, steroid hormones and fatty acids. This process is known as simple diffusion. Simple diffusion is a passive transport that doesn't require added energy, it uses kinetic (movement) energy. In simple diffusion, molecules go with/along the concentration gradient (from high concentration to low concentration). 2:33 Some proteins in the membrane are known as transport proteins (channels or pumps). They help transport molecules across the membrane that are too large to directly go through to membrane or are polar. 3:08 This process is known as facilitated diffusion. It's still a form of diffusion and still moves molecules from high concentration to low concentration via passive transport. The proteins are facilitating/helping things pass. Carrier proteins or water filled channel proteins are used to move molecules such as glucose, other sugars, some amino acids and charged ions passively across the membrane. 3:38 In osmosis, for water to travel at a fast rate across the membrane, it passes through protein channels called aquaporins. 4:11 Transport from low concentration to high concentration will require energy from adenosine triphosphate (ATP). For example, the cells lining your gut, they need to take in glucose but what if the concentration of glucose is higher than the glucose concentration in the environment? The cells still need to take glucose in but it's going to be forced against the regular gradient flow. ATP can power active transport and force molecules to go against their concentration gradient. One way ATP can do that is by energizing the transport protein itself (sodium potassium pump). 5:14 During active transport, there's other times a cell needs to exert energy for transport (known as bulk transport). If a cell needs a very large molecule (for ex a polysaccharide - a large carbohydrate), you may need the cell to fuse with the molecule in order to bring it inside. This is called endocytosis (endo means in), often this fusing of substances within the cell membrane will form vesicles that can be taken into the cell. Phagocytosis (cell eating)- a process where a cell binds to the item it wants to engulf on the cell surface and draws the item inward while engulfing around it. Often happens when the cell wants to destroy something, like a virus or an infected cell. Immune system cells (macrophages) use phagocytosis to engulf pathogens. Receptor-mediated endocytosis - A process where receptor proteins on the cell surface are used to capture or bind to a specific target molecule. Pinocytosis (cell drinking) - A process in which a cell takes in small amounts of extracellular fluid. 6:38 - Exocytosis (exo means exit) can be used to get rid of cell waste. It is also used to get valuable materials out that a cell has made. These materials are transported from the inside to the outside of the cell in membrane-bound vesicles that fuse with the plasma membrane.
My teacher has us watch these videos at home and fill out notes\answer questions on slips of paper. Honestly she picked a great channel for it, the videos are so clear & easy to follow
Just discovered the Amoeba Sisters today and learned more than I have in my 120 minute class! My professor does a lot of PowerPoints with chicken scratch notes and ever since I found you I shared 4 of yours to my class discussion board for visual learners! Thank you so much!
I have so many biology books, but these short videos teach more so much more in a more simplified way. At lease once I've watched these videos, the complex terms don't frighten me so much!! Thank you!! :)
Hi amoeba sisters, I really love your videos. Through them I have seen another dimension of life science as a biology learner in 12th grade. Please keep up the great work and May GOD BLESS.
Hey Mrs. Mika's class at ottawa high school in illinois! I am in honors bio in the year 2019. All i can say is good luck! Plz like this so her class can see this next year!
My bio teacher is a bit weird, she like, doesn't really teach, but expects you to pretty much know everything. Like during the meiosis lesson, I didn't know wtf I was even learning, so I just went to you guys and. I APPRECIATE YOU GUYS!
hi, I'm from the Netherlands and your videos are so clear! I have a biology test tomorrow and I'm sure I'm going to make it! With the drawings, I understand everything, even if it's in English I can connect the things to Dutch words. It's so much more fun to watch a video, than read in a boring booook.... Thank you very much! Zoë
How can people believe that something so amazingly complicated as a cell membrane just 'evolved'? There are just so many different factors involved in such a tiny wee creation. It's awesome!
"ATP releases a lot of energy." So I looked it up, and one mole of ATP, can release around 7,300 calories (7.3kcal/mol) of energy. The recommended calorie intake for one day is around 2,000 calories. If you connect the dots, these numbers will blow your mind. ATP is made by the mitochondria via free-radicals burning glucose. The cell membrane transporter protein pumps uses up around 20 to 30 percent of the energy made by ATP. Regular exercise can double the amount of mitochondria in your cells--which means tons more ATP. Basically, our cells are amazing, and I'm excited to learn more.
came here from school and glad i did. i learned a lot and the animations are adorable and are relevant to what’s going on in their own way. earned a new subscriber!
this video was published in 2016, and here I am in 2019 studying for my ap class watching it. thannkkkss a lot. I truly love the way u explain!!! simple but great 😍😭🙏
Thank you so much I am currently bio chem and I'm 15, and I felt a little embarrassed when I saw the content of the video, but after tuning in for a bit, I actually fell in love with it! its both entertaining, clear and educational. Keep up that great work, I appreciate your video a lot. Thank you so much as again :D
University level Physiology is hell. Not to mention I've forgotten everything from high school biology which was 4 years ago for me. Thanks for these videos. Your enthusiasm paired with the adorable illustration makes this feel less like a task.
When I stumbled upon these videos it helped me understand what I am learning in 7th grade science. Thank you Keep making these videos I appreciate them so, much.
Daily I have biology class than listening that class I am very happy to listen your class because it was very interesting to listen to observe so you can easily understand thank you so much for your channel
Hey guys! Just wanted to say how much I adore your channel. I'm currently going through my Advanced Cara Paramedic program here in Canada and your videos are super super helpful. You're the greatest! Thank you for making me laugh while reviewing!
Thank you so much for making these videos. You are the best and when I have to study for a science test about cells, I always watch you guys. You also teach more than I learn in school. Thank you again.
we're doing a lot about cells and specifically about osmosis, diffusion, active transport and selectively permeable membranes and I think I kinda understood this one xD
FANTASTIC! I am learning so much from this series. As an adult non traditional college student, it has helped me understand what were once difficult concepts. Thank you Amoeba Sisters! BTW It was really cool reading about James Cameron's mission to the deep (Marianas Trench) and how the scientific team discovered a large Amoeba at 10,000 ft!
