Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Follow CrashCourse on Twitter: http://www.twitter.com/thecrashcourse "Concert" music used with permission from Chameleon Circuit. This video uses sounds from Freesound.org: a list of these sounds can be found in the Google document here, along with the citations for this video: http://dft.ba/-1ZRl Table of Contents time codes: 1) Passive Transport - 1:17 2) Diffusion - 1:25 3) Osmosis - 2:12 4) Channel Proteins- 4:37 5) Active Transport - 4:58 6) ATP - 5:37 7) Transport Proteins - 6:19 8) Biolography - 6:37 9) Vesicular Transport - 9:02 10) Exocytosis - 9:21 11) Endocytosis - 9:50 12) Phagocytosis - 9:57 13) Pinocytosis - 10:29 14) Receptor-Mediated Endocytosis - 10:48 TAGS: crashcourse, hank green, biology, chemistry, cell, cell membrane, selective permeability, selectively permeable, active transport, passive transport, solution, concentration, concentration gradient, atp, adenosine tri-phosphate, jens christian skou, vesicular transport, phagocytosis, endocytosis Support CrashCourse on Subbable: http://subbable.com/crashcourse
In which Hank does some push ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse Special thanks go to Stafford Fitness (www.staffordfitness.net) for allowing us to shoot the gym scenes in their facilities. This video uses sounds from Freesound.org, a list of which can be found, along with the CITATIONS for this episode, in the Google Document here: http://dft.ba/-25Ad Table of Contents: 1) Cellular Respiration 01:00 2) Adenosine Triphosphate 01:29 3) Glycolysis 4:13 A) Pyruvate Molecules 5:00 B) Anaerobic Respiration/Fermentation 5:33 C) Aerobic Respiration 6:45 4) Krebs Cycle 7:06 A) Acetyl COA 7:38 B) Oxaloacetic Acid 8:21 C) Biolography: Hans Krebs 8:37 D) NAD/FAD 9:48 5) Electron Transport Chain 10:55 6) Check the Math 12:33 TAGS: crashcourse, biology, science, chemistry, energy, atp, adenosine triphosphate, cellular respiration, glucose, adp, hydrolysis, glycolysis, krebs cycle, electron transport chain, fermentation, lactic acid, enzyme, hans krebs, citric acid, ATP synthase Support CrashCourse on Subbable: http://subbable.com/crashcourse
What is it that separates what's inside a cell from what's outside of a cell? Why, that's the cell membrane. What's it made out of? How does it work? How do molecules get in and out of the cell? These are super-important concepts! Let's take a look. Subscribe: http://bit.ly/ProfDaveSubscribe ProfessorDaveExplains@gmail.com http://patreon.com/ProfessorDaveExplains http://professordaveexplains.com http://facebook.com/ProfessorDaveExpl... http://twitter.com/DaveExplains General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1 Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2 Mathematics Tutorials: http://bit.ly/ProfDaveMaths Biology Tutorials: http://bit.ly/ProfDaveBio American History Tutorials: http://bit.ly/ProfDaveAmericanHistory
Not only do we as humans make financial mistakes, our mistakes are predictable! Here's the story of how we learned that we can predict our mistakes and 5 of them you can avoid. SUBSCRIBE to Two Cents! https://goo.gl/jQ857H Two Cents on FB: https://www.facebook.com/TwoCentsPBS Two Cents on Twitter: @twocentspbs -- Two Cents was created by Katie Graham, Andrew Matthews, Philip Olson CFP® and Julia Lorenz-Olson and is brought to you by PBS Digital Studios. We love dropping some knowledge on all things personal finance and helping you make better money decisions. Two Cents is hosted by Philip Olson, CFP® and Julia Lorenz-Olson Directors: Katie Graham & Andrew Matthews Written by: Andrew Matthews & Julia Lorenz-Olson Produced by: Katie Graham & Amanda Fox Images by: Shutterstock Music by: APM -- If you want to hear more examples of “dumb stuff people do,” check out Richard Thaler’s Misbehaving: The Making of Behavioral Economics.
Website - https://cnhv.co/17pni Patreon - https://www.patreon.com/user?u=4064105 Amazon Audible Free 30 Day Trial - https://www.amazon.co.uk/gp/product/B00OPA2XFG?tag=oowkmedia-21 Four thousand years ago, I would not have had to tell you this, since if you lived in those times you would have been taught this in school, but 4000 years of a powerful directed misinformation campaign, have taken their toll, and it’ll take me some effort here, to clarify some basics for you. The Sumerian civilization is the oldest known human civilization on Earth. their gods were called the Anunnaki, which in Sumerian means “Those Who from Heaven to Earth Came”. It blossomed out almost overnight, around 3800 BC, in Mesopotamia, the land between the two rivers, Tigris and Euphrates, and came to a sudden end in 2024 BC, when it was laid waste by a deadly radioactive cloud, brought by easterly winds from the Sinai peninsula, where according to some ancient records,, a nuclear war took place. the huge black scar in the face of the Earth, in the southeastern part of the Sinai peninsula, and the blackened stones that show signs, of being instantly melted by extreme intense heat. There is more evidence. New Trading Card Game - http://www.makeplayingcards.com/sell/legendarytgc Google has put a bell on our page so our followers will not only have to subscribe but click the bell too or they will never get notifications when we have a new video thanks. Earth's Top Predator - The Reptilians - https://www.amazon.co.uk/dp/1520232918 Donald Marshall Revolution - http://amzn.to/2tYo4Kf Interesting news and documentaries brought to you weekly. https://gogetfunding.com/oowk-media-october-2017-operating-cost-budget/
After weeks of exploring the existence of nature of god, today Hank explores one of the biggest problems in theism, and possibly the biggest philosophical question humanity faces: why is there evil? -- Images and video via VideoBlocks or Wikimedia Commons, licensed under Creative Commons by 4.0: https://creativecommons.org/licenses/by/4.0/ -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Crash Course Philosophy is sponsored by Squarespace. http://www.squarespace.com/crashcourse -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Hank talks about the molecules that make up every living thing - carbohydrates, lipids, and proteins - and how we find them in our environment and in the food that we eat. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set Follow CrashCourse on Twitter: http://www.twitter.com/thecrashcourse Like CrashCourse on Facebook: http://www.facebook.com/youtubecrashcourse Resources for this episode in the Google Document here: http://dft.ba/-citations2 TAGS: biological molecules, carbohydrates, lipids, proteins, nucleic acids, food, biolography, william prout, urea, energy, monosaccharides, glucose, fructose, disaccharides, sucrose, polysaccharides, simple sugars, cellulose, starch, glycogen, glycerol, fatty acid, triglyceride, phospholipid, steroid, cholesterol, enzymes, antibodies, hormones, amino acids, nitrogen, polypeptides, protein synthesis, biology, molecule, crashcourse, hank green Support CrashCourse on Subbable: http://subbable.com/crashcourse
In this video we discuss the different ways how substances transport across a cell membrane, including facilitated diffusion, channel mediated diffusion, carrier mediated diffusion, simple diffusion, passive transport and active transport. Transcript/Notes (partial) Substances move into and out of a cell through several different processes called membrane transport. There are two main processes, passive transport processes and active transport processes. The main difference between the two is that passive processes do not require energy expenditure and active processes do require cells to expend energy. Lets start by looking at the passive processes, which include simple diffusion, facilitated diffusion and osmosis. Diffusion is the movement of a substance from where it has a high concentration to where it has a low concentration, or the tendency of a substance to spread out evenly over a given space. Simple diffusion occurs with solutes that are small and non polar. By being non polar they can move in between the phosphoipid molecules that form the plasma membrane because the interior region of the membrane is non polar. Some of the materials that move by simple diffusion include the gases O2, CO2, and small fatty acids. So, if there is a higher concentration of oxygen O2 molecules outside of a cell, they can move down the concentration gradient, across the membrane without assistance, and into the cell as long as the concentration gradient exists. The second type of diffusion is facilitated diffusion. This applies to solutes that are small and either charged or polar. Because these solutes are polar, the non polar phospholipid bilayer blocks them from passing through the membrane and into or out of the cell by simple diffusion. However, they can pass into and out of the cell with the assistance of plasma membrane proteins through a process called facilitated diffusion. There are two types of facilitated diffusion, channel mediated diffusion and carrier mediated diffusion. The difference between the two is the type of transport protein used to move the substance across the membrane. Channel mediated diffusion is when a ion, which is a charged particle where its total number of electrons does not equal its total number of protons giving it a positive or negative charge, moves across the membrane through a water filled protein channel. Each protein channel is typically specific for one type of ion, and there are two types of channels, a leak channel, which is continuously open, and a gated channel, which only opens due to a stimulus, and only stays open for a fraction of a second. Carrier mediated diffusion involves the movement of polar molecules such as simple sugars or simple carbohydrates and amino acids across the membrane. This is accomplished by a carrier protein, which actually changes shape in the process. For instance glucose binds to a carrier protein, which changes shape and moves the glucose molecule to the other side of the membrane. Now for osmosis. Osmosis is the passive movement of water through a selectively permeable membrane. This occurs when there is a difference in concentration of water on either side of the membrane. This can happen in one of two ways, water can slip between the phospholipid molecules that make up the plasma membrane, or through integral protein water channels that are called aquaporins. Now lets look at active processes. As stated earlier, active processes require the use of cellular energy for membrane transport. There are two types of active processes, active transport and vesicular transport. Active transport is the movement of a solute against its concentration gradient, or going from an area of low concentration to a place of higher concentration. Vesicular transport is the transport of large substances across the plasma membrane by a vesicle, which is a membrane bound sac filled with materials. Active transport has two types, primary active transport and secondary active transport. In primary active transport cellular protein pumps called ion pumps move ions across the membrane, against their concentration gradient. In secondary active transport a substance is moved against its concentration gradient by using energy provided by a the movement of a second substance down its concentration gradient. There are two types of secondary active transports, symport, where two substances are moved in the same direction and antiport, where two substances are moved in opposite directions. Vesicular transport involves the transport of larger substances, such as proteins or large carbohydrate polysaccharides, across the plasma membrane. In exocytosis, materials are secreted from the cell to the interstitiual fluid outside the cell. In endocytosis the plasma membrane kind of traps a substance by folding inward. In phagocytosis a large particle is engulfed by the newly formed vesicle and this vesicle fuses with a lysosome.
Think of the subconscious mind as the storage room of everything that is currently not in your conscious mind. The subconscious mind stores all of your previous life experiences, your beliefs, your memories, you skills, all situations you've been through and all images you've ever seen. The best way to understand the subconscious mind is to look at the example of the person who wants to learn how to drive a car. At the beginning he wouldn't be able to hold a conversation with anyone while driving as he would be focusing on the different moves involved. That's because he's still using his conscious mind to drive. Programming your subconscious can be done through hypnosis. The subconscious mind learns by repetition and not by logic. This is why you can convince someone to believe in something by repeating your argument again and again rather than using logic. For more information on this topic see the guide to the psychology of convincing. Claude M. Bristol