In Da Club - Membranes & Transport: Crash Course Biology #5

No video

In Da Club - Membranes & Transport: Crash Course Biology #5

Рет қаралды 5,719,782

12 жыл бұрын

Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.
"Concert" music used with permission from Chameleon Circuit.
This video uses sounds from Freesound.org
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
Crash Course is on Patreon! You can support us directly by signing up at / crashcourse
Want to find Crash Course elsewhere on the internet?
Facebook - / youtubecrashcourse
Twitter - / thecrashcourse
Instagram - / thecrashcourse
CC Kids: / crashcoursekids

Пікірлер: 3 100

@nicktekula4928 8 жыл бұрын

I swear i learned more in this 11 minute video then i did in my 3 hour lecture. Thank You

@maxvanmus4299 7 жыл бұрын

ikr

@belgiumwafflevideos8996 7 жыл бұрын

Nick T same man

@reshifineway177 7 жыл бұрын

Nic T j v h lp

@eccentricOrange 7 жыл бұрын

IKR!!

@alexsalunas5042 6 жыл бұрын

NICK LEE lab class you mean lab class😂 those are 3hours

@lexitrujillo 8 жыл бұрын

his brother is John Green? like the writer? wtf their parents must be proud

@ScarlettSky_ 8 жыл бұрын

HAHA yeah. John Green also does a hell lot of videos for crash course.

@logant6816 6 жыл бұрын

of witch one

@SlopNation 6 жыл бұрын

Never mind there parents, were all proud to have similar cells to these dudes :)

@ObjectiveZoomer 5 жыл бұрын

Yeah, his brother, the author of "the Fault in Our Stars" hosts a lot of the history series on Crash Course.

@whitneyboyd8128 5 жыл бұрын

@@ObjectiveZoomer Oh my word. I did not know that, and it is pretty awesome!

@ControltheDistance 8 жыл бұрын

Hank was not mistaken. For all the people arguing about tonicity: Hypertonic = a lot of solute Hypotonic = not a lot of solute They are relative terms. A solution on its own isn't called hypertonic, it has to be hypertonic to some other solution. If the cell is hypertonic to its environment, then the environment is hypotonic to the cell, and the cell takes on water. If the cell is hypotonic to its environment, then the environment is hypertonic to the cell, and the cell loses water. Hope that helps.

@darylmcmexican539 8 жыл бұрын

So the water with salt in it is hypertonic,and the water on the outside is hypotonic,right? Then how come the salt water pours out from the membrane?

@jala2765 8 жыл бұрын

+fayruz fikry Water with salt in it is also a solution, same as water. The salt water is trying to make the concentration of salt water similar on both sides, so it flows over to the bit that has less salt water (the outside) to make them the same. I think? Makes sense to me.

@darylmcmexican539 8 жыл бұрын

+mikaela sofea I think that makes sense,and evidently salt can be seen moving through the membrane. Which kinda begs the question,was it really osmosis? From what I know osmosis is only the movement of the solvent,not the solute. If it was indeed osmosis,I think only the water should move around,not the salt.

@jala2765 8 жыл бұрын

Don't know the answer to that question. All the websites and dictionaries I have found define osmosis roughly the same: a solvent moving across a semi-permeable membrane from an area of high concentration to low concentration (of the solvent). Maybe Hank himself will answer the question? I heard he answers them himself sometimes. Sorry I couldn't help :(

@rosybirdhouse 8 жыл бұрын

+fayruz fikry I was confused by this too. I think only the cellulose membrane must be permeable to salt, otherwise, the water from the glass would have rushed in and the cellulose membrane would have swollen with more water. That would have been osmosis. I think what we were watching was diffusion of salt from the hypertonic solution in the hypotonic solution to gain equilibrium.

@Andrea-mc6tv 6 жыл бұрын

I don't get it why my teacher assigned me to watch other biology videos on KZfaq when there's a Hank's video teaching about the same contents. Crashcourse is literally the best educational channel you can ever find on KZfaq

@melissaarcher1898 10 жыл бұрын

I really want to win valedictorian just so in my speech I can say "I would like to dedicate all of my good grades Crash Course, without of which, I would have failed." And that would be my whole speech. No inspiring words, just Crash Course.

@kayisonthemoon3583 6 жыл бұрын

Melissa Archer Did you make it?

@winju2757 5 жыл бұрын

my question exactly

@squizz714 7 жыл бұрын

Teacher used TEST!!! Student uses CRASH COURSE! IT'S SUPER EFFECTIVE!!!!

@sparklespider1356 7 жыл бұрын

It was super effective

@nickdarose1834 5 жыл бұрын

STOP SCREAMING!

@jaciewall9108 4 жыл бұрын

The ants 😡🐜

@liam1558 4 жыл бұрын

Student Pokemon. 😊

@calkumi937 4 жыл бұрын

Teacher used 4 hour lecture! Student's accuracy and speed went down sharply!

@jillianodonnell3960 8 жыл бұрын

Can Hank just teach my bio class?

@josh.cohenmusic 8 жыл бұрын

Yaaaaaas!

@davidd3081 7 жыл бұрын

Yaaaaas omg my kween

@osiria391 6 жыл бұрын

Jillian O'Donnell I sure wish that. My bio teacher is..... difficult to say the least

@kristinhelms4746 6 жыл бұрын

He'd make it so much fun. And make me ACTUALLY want to go.

@rhyhood9328 6 жыл бұрын

Can Hank just teach every class ever?

@jazbabyjj 8 жыл бұрын

He's like the Bill Nye of our generation

@CinnamonToast 8 жыл бұрын

HANK HANK HANK HANK HANK HANK HANK HANK GREEN THE SCIENCE MACHINE

@CultureBurrito 8 жыл бұрын

Isn't Bill Nye the Bill Nye of our generation?

@totoma3297 7 жыл бұрын

Not if you're in highschool

@Jay-or5ex 7 жыл бұрын

He's more of the Bill Nye in high school. But actually teaches you.

@Weretyu7777 7 жыл бұрын

Bill Nye? I used to watch Bill Nye! I agree, though, Hank does a pretty good job.

@djsqaired6644 9 жыл бұрын

used this for AP bio 3 years ago, re-watched for Into Bio my freshman year. AND now, yay, watching it again for Neurobiology. Memories!

@kimking5928 Жыл бұрын

This guy is my favorite human being ever. He’s quirky, funny and smart. He is pure genius. I don’t understand a darn thing until he explains it to me. And he does it in a manner that I feel he’s talking directly to me. Thanks dude.

@Noah-km6ty 9 жыл бұрын

Who's banana do you gotta peel to get into this club?

@kenichi-bk6bz 9 жыл бұрын

Idk

@yuminkochin9095 9 жыл бұрын

Nowa staw i wonder if anyone really gets this dudes jokes hes nuts. lol.

@LiMeiLuv 8 жыл бұрын

ya nastay.

@Hi_Jr 8 жыл бұрын

+Nowa staw wow starting off with a sexual innuendo, this'll be a good one

@yuepan6636 8 жыл бұрын

+Nowa staw I was thinking about Potassium which is high in bananas trying to get inside of the membrane =.=

@tatatory627 6 жыл бұрын

I really appreciate this series. As a non science major it’s hard to get past the barrier of “simple science” but this lecture series is simplified without being condescending.

@invertedgames7993 9 жыл бұрын

I was once asked in a Biology test what ATP stands for. My answer was Awesome Tooth Paste. I obviously didn't believe that, but that's what happens when you don't revise for your tests.

@PlaywiithMee 9 жыл бұрын

pahaha xDDDD once,a collegue of mine was asked to write down on the whiteboard Glucose (like the chemical formula) and he wrote down literary G L U C O S E.

@FROPDESAI 9 жыл бұрын

***** You don't get the joke, do you?

@youdontsay39 9 жыл бұрын

Adenosine Tritoothpaste

@FROPDESAI 9 жыл бұрын

Thera pisT Adenosine Toothpaste?

@youdontsay39 9 жыл бұрын

Hahahaha

@Caroline96100 7 жыл бұрын

It makes no sense that after hours in lecture hall I leave with nothing. 11 minutes on youtube and I know everything.

@logan9650 7 жыл бұрын

That's because you didn't concentrate?

@iBeFloe 7 жыл бұрын

Or because the Professor didn't properly explain it? Sometimes it's more the Professor's fault than the students.

@bashirwada 7 жыл бұрын

Key word here is "sometimes"...

@ndrianr 7 жыл бұрын

Same LOL

@iamSkYliNeR 7 жыл бұрын

yeah no guys stop fooling yourselves, when you say it's the teacher, it's really you..

@MiaH79 8 жыл бұрын

I am returning to school after maaaaany yearssssss! You all have helped me so much with your videos. I am actually excited about science for the first time.

@jae613 8 жыл бұрын

+Mia S yay!!!!

@veganbackpacking-8559 6 жыл бұрын

Same here! I think my brain lost the capacity to read but gained the property of watching helpful KZfaq videos ;) Let's hope the knowledge sticks the same way though..

@wheatajoo 8 жыл бұрын

"I transport myself across the concentration gradient of humans" For some reason this was really funny to me

@pankajsasan9133 7 жыл бұрын

can we get this material in PDF for text format from somewhere...pls

@sarasweetest 7 жыл бұрын

Honestly Pankaj, I so wish I could have this in PDF version. But what I've been doing is basically watching video with subtitles and keeping the window open while I take notes, pausing it whenever I need. I also take screen caps and then insert them as diagrams into my notes. I hope this helps!

@wheatajoo 7 жыл бұрын

I used to play the videos on 0.5 speed or 0.25 speed. Nice and slow

@herbertkeithmiller 6 жыл бұрын

I actually have thought exactly that.

@tou7331 6 жыл бұрын

Steampunk Ninja Porpoise uno

@likefrancenothilton5437 10 жыл бұрын

"Cells, like nightclubs, have to be selectively permeable." I love nerds SO much!

@eyeveewhy98 10 жыл бұрын

I'm so glad there are people like you guys who make such helpful videos without asking anything in return

@dylanmstar1373 5 жыл бұрын

"There is a uniform mass of John Greens throughout the club" Sounds like a good time to me.

@billywu8852 7 жыл бұрын

Crash course you all are the reason why I'm graduating!! Cannot thank you all enough. :D

@arkayenjay 10 жыл бұрын

When I type a subject into KZfaq when I need help with AS Biology and Chemistry, there is always a CrashCourse video about it! I remember when I used to watch these videos for fun (even though I never understood them fully because I hadn't learnt about it at school), now I use them for revision (but they are still fun to watch!). Thanks for making such amazing videos that help really help with college work, and keep them coming!

@afrikasmith1049 9 жыл бұрын

I bet that one day teachers would have students watch this instead of paper work.

@sierrafenley7136 9 жыл бұрын

Already happened. My teacher did it two days ago. 😧😂

@toxiclilcupcake7030 9 жыл бұрын

Flipped classrooms are real, bro.

@amandaxoxo7892 9 жыл бұрын

My teacher did today but skipped like the inappropriate things that he said. Lol

@MegaPenguin-bl7hd 8 жыл бұрын

My teacher sends us these videos to watch and take notes on them for a grade.

@noorm.1515 8 жыл бұрын

Review day in AP Bio 😂

@allychullen1058 8 жыл бұрын

I was almost failing AP-Bio and he saved my grade/life hahaha

@madisonotken1310 5 жыл бұрын

Same here.

@jellysandwich5516 4 жыл бұрын

“If everyone in the club were John green” -Hank Green, 2012

@ItCantGetAnyWorse 7 жыл бұрын

hey all, just letting you know, even some of your future doctors watch these for help ;)

@mysteriousfuntv8450 5 жыл бұрын

True

@irnbrusugarfree4797 9 жыл бұрын

Wait... so you're John Green's brother...

@irnbrusugarfree4797 9 жыл бұрын

cool

@firzenmg 9 жыл бұрын

Ash MacCormac ...i can't be the only person who's surprised..

@Duel53 9 жыл бұрын

***** You aren't. I didn't think about till now: The same last name and similar looks. Mindblowing o.o

@amandaclbn8324 9 жыл бұрын

Ash MacCormac who is John Green

@irnbrusugarfree4797 9 жыл бұрын

An author who writes love stories between heterosexual white teenagers (with or without cancer). He wrote the fault in our stars.

@katiehiles3905 8 жыл бұрын

Bio quiz tomorrow...

@hardcorenerd1009 7 жыл бұрын

Katie Hiles I'm in the same spot haha

@FrostySpade 7 жыл бұрын

Same!!! Good Luck...

@cgillis3989 7 жыл бұрын

Same here

@FrostySpade 7 жыл бұрын

@alihandrik 7 жыл бұрын

same

@piper5338 4 жыл бұрын

who else is cramming for exams

@sarahmitchell3166 9 жыл бұрын

I liked this video just because "kicking out trash, ridiculously drunks people, and Justin Bieber fans"

@nickbuchanan6367 9 жыл бұрын

And Doctor Who. Don't ever forget Doctor Who.

@nickbuchanan6367 9 жыл бұрын

Jay Sharma What?! 😰 No! I love this video for mentioning Doctor Who!!!

@Marinealver 9 жыл бұрын

Sarah Mitchell So basically everyone who watches MSNBC. They are fans, they interrupt a congresswoman talking about domestic spying because Justin Beiber was arrested in Florida. Beiber > NSA scandal?

@kukauaz8418 9 жыл бұрын

Sarah Mitchell Trash, Drunks.... Bieber Fans... so many Bieber fans...

@Runner4Life543 9 жыл бұрын

***** Would appreciate not being homophobic here k thx.

@lyanness 10 жыл бұрын

I seriously wish that I had this stuff when I was at school. I loved science, chemistry and maths, but couldn't do it to save my life. I would have seriously got straight A's if I had internet information when I was younger. Now I totally enjoy watching these things for entertainment and brain stimulation. Awesome work, Crash Course!!!!

@SputonyPlays 7 жыл бұрын

2 hours til my AP Bio test lezz go!

@okgh23w 7 жыл бұрын

How did you do?

@SputonyPlays 7 жыл бұрын

I got a 95 out of 100! Got it back like a week ago and got only 2 questions wrong. :D

@danielbody6051 7 жыл бұрын

Nice job! Here in NZ we do our exams in mid-November and we get our results 2 months later!

@THESEVERECOOLNESS 7 жыл бұрын

i have my AP Bio Semester 1 Final in 7 hours...

@akashvemulapalli260 7 жыл бұрын

Well AP test is tomorrow

@jessicatwigg8488 8 жыл бұрын

You have the gift of teaching! I have been reading this stuff in my textbook and looking at the pictures and retaining nothing. This video makes perfect sense and I just want to thank you for it!!!!!

@suggafoot123 10 жыл бұрын

Hank Green is the modern day Bill Nye! I love these videos they are a great way to recap and remember what I've learned in school. Keep up the great work guys

@TheGingerbread13579 9 жыл бұрын

I just wanted to say a massive THANK YOU to Crash Course! You may not realize it, but your videos are exactly what is on my AS Level Biology specification here in the UK. The same goes for your psychology and American History playlists, those videos are more or less exactly what I need for AS levels, so THANK YOU!!!

@nmsnerd 8 жыл бұрын

Wait, so did hank just stand outside a club in line and talk to a camera about cell membranes? Why aren't we discussing this?

@kotosqoposrly 8 жыл бұрын

"Whose banana do you gotta peel to get in?" IfyouknowwhatImean.

@elyxircreations1003 8 жыл бұрын

+kotosqopos lol

@isaacreeves8790 7 жыл бұрын

you have 69 likes lol

@bruceelliot1503 7 жыл бұрын

I thought I was the only one who knew what he meant

@aydanzebib4261 7 жыл бұрын

@ushnar9346 6 жыл бұрын

What does it mean?

@Justiniscute123 9 жыл бұрын

You just explained a whole chapter in my textbook to me in about 12 minutes with me understanding every word of it THANKS

@judeaustin1302 5 жыл бұрын

Is this guy famous? He should be! He should be making bank off of his videos. He has taught me so much. This is the best learning channel on youtube! Thank you so much for your help and teaching in a way that I and a lot more other people can understand!!!

@angelgray3256 7 жыл бұрын

Reading biology can be such a bore sometimes but you make it bearable. I'm laughing at your dorkiness, thanks for making biology memorable, dude.

@ZarahTy 5 жыл бұрын

I really love how animated he is. He's like a talking mnemonics!

@cierabellamy5532 10 жыл бұрын

I really appreciate that you explained that background concepts of membrane potential when explaining the Na+/K+ pump; I add your videos to a playlist for my anatomy class and it really helps the students understand the idea behind why these molecules are actively being pumped against their concentration gradients.

@hollymessana9303 8 жыл бұрын

I found him so hard to follow last year when I was actually learning Bio/Chem, but now!!! Thank you!!! It is awesome to have all of it condensed and explained so well, that has refreshed my knowledge so quickly.

@grcemin 8 жыл бұрын

hank's still got the best science videos out there 👌

@hamedhosseini4938 8 жыл бұрын

Nah, look at AK lectures.

@grcemin 8 жыл бұрын

ah yea those are very detailed

@desnicole4444 6 жыл бұрын

I absolutely love crash course. I learn so much. I can learn more in 11 minutes with you, then I can learn in a whole lecture. And I think it’s so cool that John Green is your brother. You guys are both so talented. Now only if I had a crash course section on trigonometry! Lol!

@AthenaSitaras 9 жыл бұрын

I sometimes ignore what my Indian professor says, although she attempts to do her best. If I know Crash Coarse has the topic - I just teach myself with the lecture notes. Honestly a headache saver, THANK YOU! I enjoy watching the videos too as if they were a TV show, which keeps me interested.

@lexipetersen2906 9 жыл бұрын

it took me three watches and a whole lot of pages of scribbles, but I now understand active transport... THESE VIDEOS ARE AWESOME!!!! I'm not even studying Bio, I'm taking a gap year. After watching the first video, I unashamedly spend my mornings learning about biology...

@saritasalvador9361 7 жыл бұрын

Dear Crash Course Biology, I am a Science teacher in Ecuador South America. I use your videos to reinforce information at the end of every unit. I am glad your talking rate has decreased which was the only con for your wonderful channel. Now my kids understand you clearly and i love the fact you have a table of contents at the end of the video.

@emilyhouse2479 7 жыл бұрын

I don't know where I would be without these videos. Seriously, I passed my exams in science just by watching these videos. No notes, or textbooks required. So big thank you to Crash Course for existing, much appreciation.

@mayaenriquez5394 7 жыл бұрын

And think about how long ago he made these.

@emilyhouse2479 7 жыл бұрын

Maya Enriquez I never realized how long ago these were made O.o

@kaylawrisner8387 10 жыл бұрын

I LOVE this channel!!! Thank you thank you thank you!!!!!! My professor will explain this to me and I won't get it, but as soon as you played this video I felt like a newly birthed genius ready to tell everyone that doesn't care about my newly found personal discoveries in biology.

@lorddio2572 10 жыл бұрын

wow

@joannafrazier6661 9 жыл бұрын

I have an EXTREME love/hate relationship with your work here. These videos are informative AND entertaining! I love your presentation and energy! How could anyone possibly hate what you do? Well, here's my issue: I cannot show these videos to my middle school students because of language and X-rated references. You have NO idea how hard it is to find exciting videos that so clearly illustrate these points, while visually engaging the audience. Any chance we desperate middle school teachers can persuade you to create a PG version of Crash Course?!

@AdamGuion 9 жыл бұрын

Just give your kids the link and hopefully they watch it on their own time.

@AudiR8spyder29041998 9 жыл бұрын

Adam Guion hahah yea because that makes a difference

@AdamGuion 9 жыл бұрын

I mean, its has grown up references boo-hoo. They've more likely than not already been exposed. And what's more important, their education or some minor references? They have to grow up eventually

@Keisha_Kay32 9 жыл бұрын

Adam Guion Trust me....these middle schoolers watch worse content on their own time lol. Just show it to them, or provide the link to watch elsewhere.

@gaborap1043 9 жыл бұрын

Try the Bozeman science videos. Those videos aren't quite as silly and quite informative as well.

@em_yia 9 жыл бұрын

You have literally saved my life! I completely understand everything I'm learning about membrane transports now! Thank you so much!

@szrc 7 жыл бұрын

"Some crazy.. drunken people. JUSTIN BIEBER FANS!" lmao.

@ushidiss 7 жыл бұрын

good joke for 2012

@szrc 7 жыл бұрын

yup agreed haha

@y__h 7 жыл бұрын

Who is Justin Beebur?

@westonsnose8768 7 жыл бұрын

0x00 0x00 what are you kidding

@jillianoneill7553 7 жыл бұрын

justin bieber is amazing shut up

@sarahbroccia5486 10 жыл бұрын

You are better at explaining than my bio teacher , thanks for saving my studying!!!

@blasterdark7144 6 жыл бұрын

Who's here watching this video right before the AP Bio exam

@joanyou6254 4 жыл бұрын

Oof not AP bio yet. Just pre-ap😂😂

@fayeduss5051 4 жыл бұрын

ok but like i‘m a sophomore and i have to study this for a normal exam

@mothboy9137 4 жыл бұрын

But in Quarantine

@mrsdjthompson 6 жыл бұрын

Thanks for these series! I homeschool my kids and I feel that Hank helps the kids get a better grasp on the topics at hand!

@roverbernhard4489 8 жыл бұрын

Would you say the night club... HAS AN ABUNDANCE OF JOHN GREENS? sorry not sorry

@kateboonzaier558 8 жыл бұрын

😂😂😂😂😂😂 lmao

@cloaksandghosts 8 жыл бұрын

lol this made my day :D

@hurdur6828 8 жыл бұрын

I can imagine it 😂😂😂

@ellas5118 4 жыл бұрын

IM SO HAPPY I GOT THAT JOKE well played sir well played

@liliannand7659 9 жыл бұрын

Studying for a biology exam, thanks for keeping this interesting. Loved the bright colours

@YasmineEPangxx 8 жыл бұрын

After learning about ATP for the last month, I only understand it now while watching this video

@Swiftyloverr 7 жыл бұрын

What my teacher couldn't do in a span of 3 hours. Thank goodness for this person and his team!

@miwalkingdenial5942 8 жыл бұрын

My science teacher loves Hank. She shows him all the time. Whenever he makes a joke and she laughs, I look at my friend and both of us laugh with her. It's the best.

@morganarensmeyer1442 7 жыл бұрын

I love these videos sm... i have a test tomorrow and this mixed with studying the PowerPoint is like perfect

@brittanymorrison6161 8 жыл бұрын

Thank god for this guy. I got a test next period and now im at least a bit more confident

@xuandaidalat2010 6 жыл бұрын

I love how you were the only dude in the queue and how other ladies were awkwardly staring away from the camera and ignore the talkative dude lecturing something that had nothing to do with the activity at hand

@kameohosley2175 5 жыл бұрын

Active Transport: low concentration to high concentration. Requires energy. Passive transport: high concentration to low concentration. Requires no energy

@ostinc 10 жыл бұрын

I'm just studying all the biology videos relevant to what my final midterm will be and I feel MUCH MORE confident in terms of a visual aspect and a more fluid explanation.

@pixlvortex 4 жыл бұрын

I JUST FOUND OUT THAT HIS BROTHER WROTE THE FAULT IN OUR STARS !!!!!!! Damn bruuuhhh

@julieta5376 7 жыл бұрын

I speak Spanish, so it's so interesting when I'm in class and the professor asks me something and I have to translate terms in my brain. like Adenosine tri phosphate to adenosin tri fosfato, and sometimes I get it wrong or pronounced it like English hahaha. Awesome videossssssssss

@alexgharapetian1046 8 жыл бұрын

It's crazy how interesting these videos are, I can literally watch all the videos in one sitting. Good stuff sir, I hope you expand into more topics as well.

@SinistersOfPain 10 жыл бұрын

That was genius, Thank you for sharing. One, or if not the best explanations online. To the point with great examples. The oversimplification was phenomenal and you guys did it without cutting corners. Thank you once again.

@bdja2018 10 жыл бұрын

Had to watch for pre-GCSE Biology. My teacher obviously thinks you are a credible source, Hank.

@bdja2018 10 жыл бұрын

In a positive way.

@xb5741 10 жыл бұрын

You don't need to know this for GCSE at all, only the basics. You only need this at A-Level. At GCSE you only need to understand the osmosis etc around the cell, nothing more specific. Edit: I meant the bit about the 'Fluid Mosaic' Structure and hydrophbic heads & Phospho lipids etc. didn't realise this was a GCSE-ey type video, I was looking for A-Level results. lol :D SO overall most of this video goes into too much detail which is necessary for GCSE Knowledge, but no harm ofc.

@mana44567 6 жыл бұрын

bless this channel!! im struggling so bad in human physiology at uni (basically biology but just in people? idk) and this is so easier to understand than powerpoints of words and terms. thank you guys!!!

@darlingsunshine.2323 Жыл бұрын

I enjoy learning in crash course because it makes learning much more interesting and the concepts were elaborated clearly with such cohesion

@kaylaconquers 8 жыл бұрын

For the record, David Tennant was indeed the better Doctor.

@thisisthewronghat2706 4 жыл бұрын

ah but can you say that truthfully when considering Capaldi's eyebrows?

@DaDunge 8 жыл бұрын

I got to agree with John on the best Doctor.

@hallesoares3046 7 жыл бұрын

True

@emilycaballero6052 7 жыл бұрын

same

@danielbody6051 7 жыл бұрын

I like T. Baker and Tennant equally, but I prefer Capaldi and Davison, myself.

@xavierhughes5522 7 жыл бұрын

I have the personal feeling Smith isn't being properly represented in this comment chain, so hi. Would you like some custard?

@DaDunge 7 жыл бұрын

Xavier Hughes Well Smith is nice, but I don't know he's a bit to capricious for my tastes. 10 was often harsh but never cruel or petty, but 11 could actually be both those things on a bad day.

@Shimmer227 7 жыл бұрын

That Sodium-Potassium pump illustration was the best one I've seen in my 3+ years of Chemistry & Anatomy... It makes so much more sense now.... I think there was a literal lightbulb that went on above my head.

@EmmaNatal-en9lt Жыл бұрын

Gotta love nerd humor! You’re great! Thank you so much!

@deanmohlman6365 7 жыл бұрын

I have been watching this for many years as a biology teacher and just realized that what Hank says at 2:44 is misleading. He says that the solution is hypertonic when he should have said the CELL is hypertonic. Overall, I think his videos are great. Hank, please correct this mistake with a note as you did at 3:58. Thanks

@cobyacton3523 7 жыл бұрын

Dean Mohlman roast them

@awesomenike6241 7 жыл бұрын

Dean Mohlman ROASTED HIM!!!!!!!!

@L6FTY 7 жыл бұрын

I noticed that as well I feel bad for the people who got that wrong because of this. A hypotonic solution is one in which the concentration of solutes is greater inside the cell than outside of it, and a hypertonic solution is one where the concentration of solutes is greater outside the cell than inside it. Hank said it the other way around for hypertonic.

@frenciela7526 6 жыл бұрын

another thing, isn't steroid supposed to be able to diffuse easily through the cell membrane?

@aliceira456 5 жыл бұрын

He’s actually right though. It’s a hypertonic, or hypotonic solution, not cell.

@maratjet 4 жыл бұрын

“you remember where you left your keys!” wrong i have adhd HAHA

@MarcoNicolasBongiovanni Жыл бұрын

"Whose banana's you gotta peel to get into this club?" LMAO, old Crash Course was wild bro

@balladofroses5282 7 жыл бұрын

This video saved me! I have been forced to take biology online, and the descriptions in my online lesson were not enough for me to understand the subject. But I looked for a crash course on the subject and now i understand passive and active transport.

@roseinthedesert3911 7 жыл бұрын

so so so thankful to have found this channel! would not be able to pass biology without it! our generation has been programmed to learn by way of the magic school bus and bill nye, so videos like this are apparently the best way for us to understand it! THANK YOU!

@gweckesser826 8 жыл бұрын

thank you sooo much hank green for this video it is very helpful and reviewed my whole entire very confusing biology unit to make it very easy in 11 minutes! yes!

@gweckesser826 8 жыл бұрын

I just have one question... in phagosytosis when a cell engulfs a particle, inside of the cell does the substance become a food vacuole/phagosome?

@ratatat12356 8 жыл бұрын

Yes, this is often the case in protists.

@wjwh7p818 8 жыл бұрын

Thank you so much. I couldnt understand anything from a 3-4 hrs long lecture and you explained it all in 11 minutes. You're amazing! Thank you!!

@lawrenceofarabia9219 6 жыл бұрын

My biology teacher made me and my peers watch this. I like it... Taught me more biology than in 12 months of school.

@genius_callidus2803 7 жыл бұрын

"Who's banana do you have to peel to get into this club." I see what you did there😏

@howarthe1 10 жыл бұрын

"Who's banana do you have to peel to get into this club?"

@totteringchatter 9 жыл бұрын

Hank, you're the reason I'm passing the IB Biology course. I am immensely grateful. *bows and tips fedora*

@elizabethpeeling531 8 жыл бұрын

your nerdiness is very adorable and SO helpful for nursing school!

@ZombieNinjaTurtle 10 жыл бұрын

TEAM DAVID TENNANT!

@thisismy210 9 жыл бұрын

YEAH!!!

@deathlyhallowsgirl10 9 жыл бұрын

YEEEEEEEESSSSSSSSS

@Andrea-mc6tv 6 жыл бұрын

If Hank is my AP biology teacher and John is my Social science teacher then I would do nothing better than studying.

@MRBirch99 9 жыл бұрын

I never made the connection between John and you, Hank. You are both brilliant. Keep entertaining us you two!

@darktank9919 7 жыл бұрын

Learnt way more in this video than I did in a month on this topic. CrashCourse is the best!

@darktank9919 7 жыл бұрын

Bio Exam today wish me luck!

@jacccamo 4 жыл бұрын

love your channel!

@L6FTY 7 жыл бұрын

Attention Hank messed up on this video! At 2:39 he gets hypertonic backwords. A hypotonic solution is one in which the concentration of solutes is greater inside the cell than outside of it, and a hypertonic solution is one where the concentration of solutes is greater outside the cell than inside it.

@MaryBrooke 6 жыл бұрын

DeLiiRiuM Thank you for that. By the way you, got “backwords” wrong. It’s backwards, with an “”A”.

@amandabivens247 6 жыл бұрын

I got a B on my huge biology exam today thanks to all of your videos. Thank you so much for caring and helping students!

@alyxandriaang 10 жыл бұрын

This video just helped me pass my bio test. True life saver. OMG AND I JUST FOUND OUT U ARE JOHN GREEN'S BROTHER!!!

@maryanaden3645 6 жыл бұрын

Alyxandria Ang 😂

@JuanDVene 9 жыл бұрын

Confused. Did you mix up the hypotonic and hypertonic, or have I just been taught wrong? I thought the hypotonic cell was the one that swelled and exploded.

@MrBalajifred 9 жыл бұрын

+JuanDVene Yes, i think that he got it mixed up, i also learned the opposite, the hypotonic cell is the one that swells and 'explodes' as the salt/ion concentration is higher in the cell, then the outside, so water rushes in to try and over come this. ad Hypertonic is when the salt/ion concentration is super high outside, so the water in the cell rushes out to dilute the solution and the cell is left shriveled.

@skyx12435 9 жыл бұрын

You can use hyper/hypotonic to describe both solutions. The one inside (Cytoplasm) the cell and the one outside. A solution is hypertonic when the concentration is higher than in an other solution. (Hypotonic is the same but reversed) When the cytoplasm is hypotonic (lower concentration than outside) the cell swells, because the outside is hypertonic to the cytoplasm. It is only a question of ones viewpoint.

@oftheearthbutfromthestars 9 жыл бұрын

+JuanDVene For osmosis, we look at the concentration of water instead of the solute. That's why the direction is from hypotonic(more water) to hypertonic(less water).

@e.padgett9355 9 жыл бұрын

+JuanDVene he clarified it in the video in writing. Cell is hypertonic, but the environment is hypotonic. I was taught from the environment's point of view, he is explaining it from the cell's point of view.

@makeway3080 8 жыл бұрын

+JuanDVene Naw man dat wan is da one dat looks rinckly n shit cuz da water always goes to da hypertonic side man