Cancer | Cells | MCAT | Khan Academy

[@robertparks2933]

BUT SERIOUSLY... IN 12 MINUTES AND 35 SECONDS I HAVE LEARNED MORE ON CANCER THAN A 1 AND HALF HOUR LECTURE IN MY COLLEGE CLASS... THANKS SAL!

[@BloodButterflies]

0:58 cell depression at its finest

[@ThatTownDrunk]

I really enjoyed this, it taught me lots about cancer and how it works. If you did an entire playlist on Cancer I would definitely watch it.

[@buthaina252]

Bailey Macnaughton wonderful idea

[@mohammedsh98]

I really appreciate all the hard work that you take to help other people understand,may god bless you

[@fleshcookie]

This man is one of the great minds on this planet. He could easily teach at schools like Harvard or Stanford. It is a true privilege to be able to listen to him speak on such important issues

[@jjumpykkppblabla]

"Recognise that there is something wrong with themselves, and might admit it, and kill themselves (suicide)" -- this made me laugh helplessly especially with last minute study

[@real-em4el]

Bro same 💀💀

[@helgihg]

I actually learned this while learning physics, specifically why some types of radiation can cause cancer by upsetting the electrical state of atoms in a DNA molecule. Khan, brilliant as always. Keep it up!

[@uPB4uTube]

'invasive' 'benigu' 'tumour' 'neoplasm' 'metastasizea' 'frequently' all of Sals amazing vocabulary, words i have never heard of till now then... 'grows like crazy' i love it!

[@AmandaVF1]

Lol, I enjoy watching these videos to study from since I am in anatomy at the college level and some of these are good "refreshers". I have also laughed at some of the word choice for example "Psychopath" and his "descendents" . This makes studying fun. Not only that. Sometimes I just watch these videos because I like watching them.

[@iSKsniper]

Our teacher made us watch this video. Im a freshman. In high school

[@neil0573]

iSK I’m taking bio over the summer so technically I’m a freshman lol

[@neil0573]

iSK you’ve graduated now lol

[@neil0573]

U done with college? 😂

[@madadiable]

cancer has been one of the serious medical condition especially in my country Kenya. working in public facilities have made me learn more. The problems we are facing are: lack of information about cancer,inadequate diagnostic facilities doctors. The information you are giving will enrich people in terms of knowledge and take appropriate measure in controlling its menace.

[@chissstardestroyer]

You did fine with pronouncing metastasizing, when a cell metastasized; based on it being hard for you to pronounce, I'd say, Mr. Khan, that you did a marvelous job of working your way through that problem... if you have difficulty pronouncing anything, take your time and do it right.

[@stephanedanilo]

Thank you doctor. I wish i could get you as biology professor. your explanations are very clear and way understandable compared to that of my professor. Good job!!

[@alizadevries1876]

"...recognises that it's somehow damaged and destroys itself." Me_irl

[@normalpeople]

two of my relatives just died from cancer last 2 days. :( maybe I should learn something from here so that i help the people suffering from various type of cancer in the future...

[@rawly3387]

My grandfather dead from cancer in his liver

[@Rigelcentauri58]

Congratulations!! You have a fantastic way of transmiting knowledge, simple and easy, perfect technic.!

[@shauna1609]

This was extremely clear and the way you break it down which such compassion. I love how you are keeping it real and still manage to stay on topic. Thank you for this amazing video:).

[@frankieroandMCR]

Can you do some more in depth videos about cancer e.g. the angiogenic switch, growth factor overexpression, autocrine GF signalling etc!

[@VioletVoorhees]

For the ones who are asking him to go more deeper, just look at the other videos. This was an introduction to the topic and a generic, wide overview.

[@jimmyb4982]

It's just a lame attempt to share how intelligent they think they are. We don't care.

[@Jeroeneenendertig]

.. the reason i chose to do biology. im still 16 so i got a long road to go, but this might be a way for me to have any influence in the world. (:

[@astitwakumar6994]

what you doin now?

[@Jeroeneenendertig]

@@astitwakumar6994 Wow, it has been 9 years since that comment. I just handed in my first application for a PhD this week after graduating from my master's in life sciences at Utrecht University! (I know... this isn't LinkedIn :p)

[@astitwakumar6994]

@@Jeroeneenendertig oh my gosh, i wasnt expecting your reply , not this fast at least, but congratulations on whatever accomplishments you are making in your life(btw i also saw a man grow up in just a couple of seconds)

[@Jeroeneenendertig]

@@astitwakumar6994 Haha, it's coincidence. I was watching another video on gene editing when I saw the notification pop-up. I have grown up, but you never stop learning right. What are you up to, are you into biology too ?

[@astitwakumar6994]

iam also interested in biology but my parents are hoping for me to do engineering. Guess its time to do some bioengineering or biomechanics i guess

[@dreadjoker10]

gotta say, you have got to be the greatest teacher in the world

[@1dirka]

Your videos and presentation style is so amazing. You are a natural born teacher. Do the world a favor... DON'T QUIT!

[@Molcos429]

I think it shows how simple cancer can be explained i already had good knowledge of cancer before watching this but it shows easy to explain and we know exactly what we are dealing with and how difficult the solution is/are. Because its our own body not some foreign entity effecting the body but our cells mulfunctioning.

[@AS-ns1lg]

I like the phrase "by-product of broken mytosis" :) it explains everything.

[@KarenGuzman-g8u]

I am very grateful for your patience in trying to explain these topics. Thank you for all the hard work.

[@Zanco]

I am going through all of Khan Academy videos right now! I will be as smart as this guy! or at least as knowledgeable as this guy!

[@Freedom-ge4zf]

I have lernen with Mr Khan Mathematics, chemistry, physics and now medicine 🤣🤣 are you really great man

[@guerismaladies9963]

For a definitive and effective treatment of Cancer, hepatitis AB and C (bloating, swollen belly and intestinal gas), urinary tract infection, HIV AIDS, infertility, diabetes, cyst, myoma, fibroid, myopathy ... etc. we have products made from natural plants very very effective without side effects on health. please contact us on [phone] via WhatsApp

[@hitm43]

8:15 "Cellular psychopath" sounds like a good name for a band.

[@JohnFlick]

Prayers will do more than money and your studies ever will. without them, you wouldn't even begin to think of a cure.

[@J0ELLEx]

This is a great intro video to cancer. Brings everything I know about it so far together and gives me this great base to keep going

[@valhala56]

I'm really glad to hear Medical students learning their biz on KZbin, makes me feel secure. LOL

[@thousand-subscriberswithou1776]

This comment was posted when I was 2

[@przemkowaliszewski3290]

I define cancer in a different way. Tumorigenesis is a complex, temporo-spatial, multistep phenomenon that begins locally in macromolecules at the level of quantum interactions during spontaneous thermodynamic fluctuations [Waliszewski P et al. On the holistic approach in cellular and cancer biology: nonlinearity, complexity, and quasi-determinism of the dynamic cellular network. J Surg Oncol 1998; 68(2): 70-78]. Macromolecules undergo deterministic chaotic oscillations caused by physical forces whose average value in time is zero. Some of those fluctuations lead to the irreparable DNA damage in protein encoding genes as well as to the altered function of DNA polymerases. Those alterations result in both qualitative and quantitative changes in non-linear, non-bijective, and quasi-deterministic dynamic cellular network composed of genes, their regulatory elements, RNAs and functional proteins. In particular, mutations appear in some critical genes during DNA synthesis and replication (compare [Tomasetti C et al. Stem cell division, somatic mutation, cancer etiology, and cancer prevention. Science 2017; 355: 1330-1334.]). A novel cellular phenotype emerges. Since that process occurs random and parallel in different stem cells, malignant phenotype may appear in different tissue localizations. Usually, cells with the mutated DNA self-organize in a tumor, that is, a tissue structure composed not only of malignant cells, but also fibroblasts, muscle cells, and blood vessels. Although that lesion develops locally, phenotypically malignant cells spread over the body and colonize the distant organs as metastases. The metabolic influences of the local lesion change eventually metabolism at different levels of hierarchical organization of multicellular organism, from subcellular organelles up to the organism level. Those metabolic alterations lead to death of patients. Thus, a variety of interactions within that hierarchy determine the course of tumorigenesis as a disease.

[@xxbbbddgggg]

You're very smart! You might as well make a video on how to cure cancer too!

[@Ava-dv6rp]

I really enjoyed this video! Cancer is ripping the world apart that’s why I want to help

[@MrElmo3112]

Great video, but maybe you should mention an important point that everyone seems to forget about when talking about cancer... How does it kill you??? You'd be surprised how many people know lots about cancer but can't answer the above question.

[@quincy451]

"something wrong with my brain". don't think so. Your brain works great. It takes the most complex subjects and makes them simple to understand. You are like the professor in college you wanted to take over and over.

[@latewire]

the plural of nucleus is 'nuclei' I'm a 3rd year med student. Excellent job. Very well explained.

[@valhala56]

Haha! for a soon to be Dr you need to lighten up. I'm 53 compared to what I absorbed in College to what I absorbed the following years I would call it a ratio of .01% to 89%. KZbin is awesome. I have learned more in 3 years of KZbin then I would have learned in a decade of Univeristy. Good luck to you kid!

[@mrbigpappy85]

I wonder if there's a method of artificially inducing aptosis that kills off mutated cells before they become cancerous

[@Lima547]

Thanks from South America! Your intention to educate the world is really wonderful!!! Thank you very much!

[@latewire]

I learned this stuff a year ago. As for youtube being bad, I wouldn't care if a rocket scientist learned calculus from Khan. If it gets an "A" on the test in class, it's accurate enough to learn from.

[@crez12002]

I have to say,, you are really enjoyable to listen to,, you have a great way of teaching,, God bless you

[@andy5579]

@valhala56 If you even realised how much medical students had to work, you wouldn't be scoffing here. It's a great recap to difficult concepts. Thanks Khanacademy!

[@babygiraffe123]

Cancer: A disease I'm all too familiar with. Lost both of my paternal grandparents, my uncle, and my mother, all to cancer. My husband also lost his grandfather to it, last year. NOW....my maternal grandfather was just diagnosed and there's no hope for him, in addition to another one of my uncles, who is currently fighting it. So basically, it's wiping my family out, one by one. We need to find a cure for this damned disease, and we need it NOW!

[@internetjunky4327]

I have to go to the doctor tomorrow, this video was so scary

[@KingWasabe777]

I had to watch this in my year 7 science class the other day!

[@intosoccer2]

Can you please make a video for the Lac Operon process in E. Coli? It's so confusing and you would be even more fantastic for clarifying it to all us biological sciences majors out there. Thanks Sal!

[@xtreme6409]

Yes bro its very confusing

[@prabhanshukatiyar4635]

"Grow like crazy" was it something important enough to write?

[@georgeskazadi]

Yes.

[@latewire]

Correct. All cancers start from just a single messed up cell. Though, every human started from one cell too (called a zygote), so it's really not all that impressive.

[@xLittleVinnie]

Wow! I like learning stuff just to know it. If u could make more videos like this ( and the brain teasers I love those) I like learning stuff even though I don't need to know it especially about the Human body and space. Thanks for the awesome an easy to understand video

[@buthaina252]

Wish people form all the world 🌍🌎🌏 enjoy this like i do thanks khan academy

[@barrypetersen3671]

You said that maybe one day you'd go into a whole playlist about Cancer, and how we're trying to treat it. Could you?

[@hustlehardstudyharder8197]

Barry Petersen Go to the Khan Academy My Medicine channel he has a few videos on cancer. /user/khanacademymedicine Just search "cancer" in the search field.

[@barrypetersen3671]

Thanks so much!

[@endthedisease]

A very simple explanation anyone can understand.

[@tanvimuppala1684]

You are great you taught me everything I needed to know about cancer😊😊😊😊😊😊😊

[@sofajastjernholm]

you're reeeeally good - my teacher even uses your videos in class

[@loverofbeats]

thanks for announcing this on youtube stephan

[@marcorodriguez-diaz4444]

Incredible simple explanation by phases/-Wow!! Cant wait to see what AI does in the future. Great Job

[@Lavionne]

Watching in 2022 , amazing lesson 🤩

[@mrstutyfruty09]

wow !!!! thanks you help me a lot

[@Amy_jane21]

please do a playlist all about cancer!

[@ebqz]

@Chnamanjx problem with that is, that there is no single "apoptosis-gene". this process is highly regulated and controlled by a number of different factors.

[@futureroyalty2462]

He mentions that neurotic cells can duplicate/divide, yet they can't the only thing that cells do in the brain when they are damaged they recognize the damage and cut off the connections with other cells around it and the cell parts are broken down then added to other neurotic cells

[@stungj]

you are so kind !

He explains that in the video. In short, because it's not just one disease, but rather a class of diseases.

[@TheRonny213]

amazing thank you

[@xXSabzyKababzyXx]

Stop Praying and give? This kind of undermines any faith don't you think. Sure give, but never lose the ability to connect with faith as a medium of hope with things like cancer. If we outlaw praying in this sense it shows what kind of humans we have become. Cancer is present, we can't deny it's presence but it's just one of those things which is inevitable- despite my support for cancer research UK i can still see how it's one of Human natures enigmas, depresseing though it may be.

[@herbology585]

Can you recommend any good book about understanding cancer especially breast cancer

[@begotten59]

good teacher! thanks,

[@MultiNerve]

What causes Photo-oncogenes? I thought that any DNA changes were inherited from the parents? Or can they be affected by outside factors (radiation, carcinogens, etc.)? Future oncologist here, so I really would like to know.

[@MissLionRose]

You explain this so well! I really appreciate your content. thank you 🙏😊💯

[@laysa713]

Great video. So it really means that all of us have the possibility to have cancer because of the continuous mitosis and there might come a time that some cells would have mutation thingys goin inside them. Ohhhhknoes.

[@creepyguts]

can u do a video on the full process of apoptosis and necrosis, outlining differences

[@huzaifaabedeen7119]

thank you sir

[@mxlxzybbb]

thanks!!!

[@13DarkCookie13]

Even plants have cancers? I thought it was just animals. Weird. Interesting lecture tbough, hope the world finds a cure someday

[@HA1Ldisc0rdja]

GROW LIKE CRAZY!! Love. :)

[@DojoatHome]

Quick question, How does a mutated cancer cell travel through the body if cancer cant live in an alkaline environment. Isn't blood 7.4 PH alkalinic. How does it quote unquote metastasize. Thanks

[@AliHussain-bg2lf]

They say it travels but in reality whats happening is the cells are replicating their environment and they will do so if their interstitial spaces or their surroundings are acidic

[@EclipZeMuzik]

dude you're amazing i love this!

[@ban408]

excellent video keep up the great work

[@Tealy855]

@Anonie324 Thats "ALIVE AND WELL by Philip E. Binzel, Jr., M.D Whale" for the free book

[@zx6rtt]

excellent information, as usual thanks for the upload : ]

[@buthaina252]

I enjoyed this like to see more in the future 💞

[@xGIAKANAx]

who is the guy narrating?? hes awesome!! :D

[@rajarshi1432]

He's Sal

[@doc3660]

Watch this informative video about *9gag*.

[@ThatAnnoyingBird]

And Pewdiepie

[@Chnamanjx]

Lack of aptosis seams to be the problem. If you can find a treatment that can kill cells that does not have the aptosis gene functioning, then you can cure cancer. But how can that be done? The aptosis gene doesn't give off a protein market on it's cellular membrane does it? If it did, then you can create a treatment based on that. The only way I can think of, is engineering a virus with the aptosis gene that inserts that gene.

[@jaredjonas1353]

*So basically I am a billionaire!!!* 😜 4:00

[@guerismaladies9963]

For a definitive and effective treatment of Cancer, hepatitis AB and C (bloating, swollen belly and intestinal gas), urinary tract infection, HIV AIDS, infertility, diabetes, cyst, myoma, fibroid, myopathy ... etc. we have products made from natural plants very very effective without side effects on health. please contact us on [phone] via WhatsApp

[@WiltedGoddess]

Cell citizens, cell psychopaths, thanks for making me imagine cells as little people that either commit suicide or are very rude. Love your videos.

[@bibs94]

TOO EASY, GO DEEPER PLEASE !

[@chizoioioi]

Yeah Id like him to do molecular level of dna mutations, recognition of flaws, etc

[@jimmyb4982]

Lame. We don't care how intelligent you think you are.

[@bibs94]

@@jimmyb4982 and we don't care about your opinion. We asked the video creator not you. No one asked you to reply after 4 years.

[@jimmyb4982]

@@bibs94 Lame, again. Get over yourself; you'll be better for it. And who's we? Only you asked.

[@drrozyjan1010]

@@jimmyb4982 u seriously r dumb ..we r those people who liked on his comment,so simple

[@bluepurplea1121]

Hey do the cancer cell undergo protein synthesis as well ?

[@varunkishnani]

great video ! really enjoyed it... Can you tell me which software i cud use to create blackboard videos like these ??

[@QadirPopal]

thanks.

[@aleshiadearlove739]

Cellular phychopath haha awesome. Thanks, great video!

[@chissstardestroyer]

So, given all that, how do you get a benign cancer? I know I heard of that in passing, but how does that come about? I really do want to know.

[@goodday4112]

POSITIVE AND NEGATIVE MAGNETS HAVE A POWER TOGETHER TO CREATE ENERGY IF WE PUT THEM NEXT TO EACH OTHER. THIS WILL BE FREE ENERGY TO THE WORLD.

[@christinelao3068]

did he mention the term 'malignant'? he kept going around its definition but wouldnt say it or write it. nonetheless, i enjoyed this, thank you!

[@shaquilleheath8271]

wowow wowow He did not but malignant is dangerous and it is cancerous opposed to it being benign which means its dormant and doesn’t really affect the body and can stay in you until you die as long as it causes no problems and doesn’t grow but malignant neoplasms are deadly which do grow and spread throughout ones body (metastasized) you will either need to cut this out and receive chemo (usually) and this is what we call Cancer in laymen terms.

[@jegej18]

carcinogens Look them up...and avoid them... I think the world should come up with alternative methods to get things done and rid the world of all carcinogens When human kind stops worrying about winning the war and concentrates on preventing a war, the fight would be won, because there would be no fight.

[@idster7]

11:40 Is there such a playlist? I would love to see it.

[@ltlegenda]

it's interesting

[@8Anthea8]

"If you have a lump..God forbid if you have a lump either way...it can kinda stick around, no damage done" "..grow like crazy" "..some sort of cellular psychopath"

[@dysvanlist]

Why not use a retrovirus to reintroduce the self-destruct mechanisme?

[@marvoht]

"cellular psychopath" lol

[@lizziepaulin1784]

😂😂😂😂😂😂