Introduction to Cellular Respiration

[AdorableAdipose]

Will you talk about the Transition Rxn?

[heywasshatnin]

This is so much easier I understand than my professors lecture! I loved the word origins that helped so much

[kamiakin5]

not that it matters much, but more current findings are that the entire cycle only produces 32 ATP based on producing 2.5 ATP for every NADH and 1.5 ATP for every FADH2. I was wondering if you had planned on updating this, or if you were going to leave it as is?

Thanks

[TheOriginalTreepaw]

@kamiakin5 I read this and my head started hurting cause I don't think I've learned about the "32 ATP" or "NADH" or "FADH2"...... lol....

Learing is Pain &

Pain is Learing! EPIC FAIL!!!

[kamiakin5]

@TheOriginalTreepaw I apologize, in this video he doesn't talk about NADH or FADH2, I was just explaining why the current thinking is 32 ATP for the cycle and not the higher 38

[HarryPotterPoems]

all i can say is, thank GOD for the khan academy!

[firemouth55]

Thanks! My teacher referred to the Krebs Cycle as the Citric Acid Cycle, but other than that, excellent job!

[anamurillo28]

i have an exam in 2 days u saved my life!

[jhs24jesus]

microbiology test in 2 hours... eek!

[jennabeanct2]

Very helpful! Thanks!

[manny8696]

Wow man thank you so much without you i would have failed my cellular respiration essay, man you are awesome keep the work up thank you again:)!

[emilychristina1988]

extremely helpful, thank you so much! =)

[Sub4SubbingMe]

Where is link reaction?

[ArtistBut12]

this video is my science homework lol

[maniacwarhead]

@ArtistBut12

lol it is my homework too.

[spirituelconnexion]

My textbook says 2 ATP + 2 ATP + 32 ATP = 36 ATP :S:S:S

[rererehanoate]

thank you so much for the video :) may god bless you :)

[luvculturegurl26]

He's amusing and teaches it correctly. Trade places with my teacher? PLEASE!?

[soumyasayujya]

awesum!!..... thanku!!........

[memorycardslut]

is the krebs cycle and the citric acid cycle the same thing?

[susannguyenxo]

@memorycardslut yeah it is

[princessxashely]

@memorycardslut yes

[LJDPR]

@memorycardslut Yes it is. It can also be called the tricarboxylic acid cycle (TCA cycle).

[WinnieVee]

Lol I have a bio midterm tomorrow -_-. This helped!

[cotar5]

thanks you got my science project ready

[islandelite1]

Sal, you are definitely God-sent. Your work, dedication, and willingness to help others is awesome. there is not enough words in vocabulary to thank you. keep up the good work. you are amazing.

[kayelem23]

I might be one of the rare ones that isn't here for my midterm! I'm actually studying Biology at university and I tutor highschool students. I wanted an example for an introduction because I wasn't sure how to start... I might just make her watch this video, she won't need me anymore! you're amazing :)

[Grkgermn333]

@kayelem23 I actually find that sad. I wanna become a teacher, and I don't want to be replaced by Sal :(

[kayelem23]

@Grkgermn333 Well you can use his videos as inspiration! This girl didn't have a lot of money so she wanted to do few lessons because she couldn't afford it. Instead of taking advantage, I suggested she try with these videos and that if she still doesn't understand, then i'll help her.

[MrMeBeDaniel]

thank you so much!

[chibisaya]

yay for using this to study for my final the day before <3

[HostingReviews1]

gud sharing.. 

[05husainai]

You my friend are god.

[Regenbogen026]

I think I just found an education gold mine.

[nikitamthomas]

finals start this wednesday... that means I have a lot of bio and calc videos to watch before wednesday,.. The tension video saved my life!

[sharon12301]

I teach allied health and the Khan videos are so helpful to my own understanding and the students do not have to a less interesting and clear lecture. Amazing

[AsianSwede]

When my parents walk in I open up a porn tab cause it's easier to explain.

[jmilkyway24]

this is a beautiful, beautiful thing. goodbye paying attention in bio. hello youtube videos.

[TheOfficialHaddy]

@jmilkyway24 OH my gosh this is what im doingggg exactly!

[lummy93]

whats the software you are using to do this video? its pretty cool!

[TheKtate]

Thank you... my bio mdterm is tomarrow, ur videos helped me learn more then 4+ months of class

[Spartanboss117]

this is awesome this saved my biology grade

[madzzers]

I love you.

[Mrjaksonn12345]

i learned more from this in 14 minutes than a month of bio class

[Angelina267]

in case you care about word origins hahahaha



[Angelina267]

this is excellent. One of the best videos on youtube. Thorough, precise, and enough detailed information to not only give us the main idea, but not too many stupid little fragments. Thank you so much. My honors bio teacher is 80 years old and doesn't have a clue what he is doing.

[hayonah100]

شكرا جزيلا لقد كان هذا الفيديو مفيدا جدا بالنسبه لي

thanks very much

this video is very useful for me

[lilpinkcess894x]

Thank you Thank you Thank yoooooooooou! Why could we have teachers like this, it wud prevent all the exam stresss !

[jackrussel999]

THANK YOU, I've got a test tomorrow on this and I'm confident I will not fail. :)

[ovechkin651]

The 15 thumbs downs should have their accounts deleted.

[KichaaSDL]

You sir have saved my bio grade this semester. Thank you. So so much.

[jennafh123]

I think you just saved me from getting a C in Bio.

[wildbill0528]

I'm just watching this for fun. I'm done with finals

[KKianaSkyee]

You write like the "Disney" lettering..

[MrSleepinSloth]

You should be the teacher in the Magic School Bus. LOL

[OtakuRevolution0001]

studying for midterms/ finals? forget that, just go to khan academy! (btw. thank you soooooooooooo much for the video. you helped me more than my teacher that makes us do nothing but watch extremely old videos with excruciating audio.) i heart khan academy whenever i need studying!

[aliciaxxily]

THANKS SO MUCH ! I don't understand a single thing my teacher says and when we ask questions, she just yells at us and I have a test about this later on this week. This was very easy to follow, thanks very much for breaking the information down

[PurpleLipstick01]

I just wanted to let you know how much I appreciate this video and your work as a whole. It's extremely helpful and your explanations are easy to follow. thank you very much

[Jackyzappy1]

Thank you SO MUCH! This makes everything so much clearer!!!!!!!!

[HogwartsIsMyRealHome]

I have a final exam in an hour and a half. You just saved my GPA. I love you.

[ilovegrumpybear1]

OOOOOH YOU USED WIKIPEDIA.

[MyNameIsSteveYesitis]

isn't it FADH2

[desigirl2293]

@MyNameIsSteveYesitis yeah...it's suppose to be FADH2...I'm taking biochemistry so I know the steps in detail. So for anyone watching remember that FAD--->FADH2

[MrThebossmaster]

I can now doodle all through bio and still make an A!!

[11812012082926]

I think you are amazing! The way you break things down to their most simplistic forms then go on from makes cellular respiration much easier to comprehend, thank you.

[moocowman0]

Mr. Khan, you are absolutely incredible, however I really think you should do a video on anaerobic respiration and go into more detail about fermentation. I know it's not all that complex or important, but because it was not in your videos, I was very confused when I tried to read my biology book. Thanks though:) sooo much!

[wafulmangmr]

test, tomorrow just made easy :)

[MelonBreadHead]

THANK YOU!

[kesh873]

thanks a lot !! its realy made me easy with this chapter.

[Triattack007]

Thank you so much man

[cocokrispiis712]

This might have saved me for failing my test tomorrow.

[TheTdwpforever]

So, when our knees hurt it is a lactic acid build up which is caused from lack of oxygen?

[colacastell]

why do we need gylcolosys, if we put in 2 it to get 2 out?????

[veritasuser]

@colacastell we put 2 in and get 4 out which gives a net out put of 2

[Akkebu]

@khanacademy

isnt it supposed to be NADPH not NADH?

[TheHowlingLass]

@Akkebu No, NADPH applies to plants, so it gets called that in photosynthesis. It's just NADH in cellular respiration :)

[Rooseveltboh]

thanks

ppl like u is the reason i always go to youtube before a bio test now... have done so for my 2 last tests

[Mrmbc60]

Thank you explained very well. 

[BigMootsie]

can you come live in my house while i study for my biology exam? kthanx.

[Rhogin]

The way I learnt it, ETC produces 32 ATP not 34 ATP. There are 8 NADHs and 4 FADH2s which gives a net total of 32. You said there were 10 NADHs, but 2 of those NADHs were made during glycolysis, and these 2 have to become FADH2 to pass in to the mitochondrion membrane.

[lovetolaugh1265]

I don't get it but ill explain that in another video later :P

[BumbleBeauty4]

I have a bio midterm tomorrow. this taught me better than the 2 months of lectures.....

[sweeterthanhunni]

Please replace my bio teacher. And my previous math teachers if you will.

[wildkidsuchi]

@sweeterthanhunni ... and every other teacher...

[sweeterthanhunni]

@wildkidsuchi Lol I only said that cause it seems as if (I could be wrong) that he is more adept or at least more interested in science & math fields as well as economics but I don't take that course. My other teachers aren't so bad. It's just my science/math teachers lol. :P Literally my bio teacher READS from stuff she has written down and just hands us a powerpt. with no info. AND she never can answer our question (she googles them.. -_-).

[xDevilicious]

mr. khan,

i just want to thank you sooooo much for your videos!

i just discovered ur videos a week ago (and im so mad that i didnt see ur videos earlier)

i was getting all C's and D's on my AP bio tests. but after i watched all ur cellular respiration related videos, i got my first A

thank you so much for saving my grade in AP bio, now im gonna watch all ur videos before my AP bio tests so I might actually have hopes of getting an A in the class (:

thanks !

[tinypeanut16]

isn't is producing 36 ATP not 38?

[HappyAngel725]

@tinypeanut16 It can produce from 36-38 ATP

[QBNhuanBut]

@tinypeanut16 2 through glycolisis plus 36 from the others

[Rhogin]

@tinypeanut16 You're correct for the most part. We PRODUCE 38, but have a net total of 36 ATP, but this is theoretically. We produce 4 ATP in glycolysis, but we USE 2 ATP in the process, we produce 2 in the Kreb's cycle and 32 during ETC and chemiosmosis. If you add everything that is produced, it's 38, but since two is used in glycolysis, it's 36. In all reality though, we produce far less than 36, but 36 is what we should produce theoretically. Hope that helps.

[Rooseveltboh]

@Rhogin ty

[GeorgeL909]

I agree, it is 36 ATP for Eukaryotes theoretically. It would still be 38 for Prokaryotes because the 2 NADH from glycolysis do not have to cross any mitochondrial membrane, and thus the 2 potential ATP are not lost. That always made for a tricky test question

[vagrantaim]

@GeorgeL909 in brain cells ATP production is 38.

[gemluvpink]

you are such a babe!!! your videos help me with my a levels sooo much for chemistry and biology! thank you

[Heymacaraina]

You save my life!!!!

You should get paid to do this

[101OfficeFan]

I got a 94% on my anatomy test thanks to these videos :)

[arbuncg10]

Thank you SO much for making these videos! I am a college biology student and this has helped me tremendously :)

[gammaray850]

mrs. gill anybody?

[royteo123104]

@gammaray850 Yep me lol who r u

[adrenalinespeedrush]

What program is this that your using to write on the PC whiteboard with these neon colors?

[MsM0N3YL0V3R]

This helped clarify so much of what we've been learning in A&P. He's so clear and succinct.

[emsei817]

I go to Ohio State and this 14:19 video is so much better than the hour and 18 minutes I spend in class twice a week.

[killazerg1]

@emsei817

Just an hour and 18 minutes? I spend 16 hours a week for my A & P

[emsei817]

@killazerg1 Well yeah because you're in high school so you're obviously going to meet everyday and put more time into it. Osu has to move at a faster rate because we're still on quarters. Technically our class is 1:18 on Monday a 1:18 on Wednesdays and then a 2:48 lab not counting all the hours for studying. But with 16 hours a week you should definitely pass the test so good luck

[killazerg1]

@emsei817

Who said anything about high school? This is a college course! : )

10 hours class and 6 hours lab weekly

[Playyd]

Does anyone know any other channel i can find bio / chem / physics lessons ... ? please help me out :)

[Zoeysmiles]

@Playyd bozeman biology

[doujoe3]

Man, u should make ur own school.

[MissKath29]

Men, I understood it more here than in school. Thank You!

Hope this will help in our periodical examination :)

[salmavich]

i got an A in my class of bio 121 thanks to your videos and my hardwork !! the teacher suckeeeeeeeed ! thank you khanacademy :) keep up the good work !

[SidTheSeamstress]

thank you khan! I'm in AP biology and have such a hard time with cell biology, but these videos help so much!

[Mellonikus]

This guy has one degree: In Badassology

[TheTdwpforever]

whats ADP, NAD+, NADH, FAD, FADH2, GDP basically all of those?

[Santeria231]

@TheTdwpforever They carry electrons basically

[TheTdwpforever]

@Santeria231 oh, well there has to be more than that! i don't know

[Santeria231]

@TheTdwpforever What level of bio are you in? It probably depends on that concerning how much you need to know.

[TheTdwpforever]

@Santeria231 first year biotechnology. introduction to biology.

[allpinoyballer37]

@TheTdwpforever electron carriers

[TheTdwpforever]

im going to fail life.

[tondonagasaki]

Absolutely brilliant, well done and thank you!

[MONDAY7464]

THANK YOU!!!!! THANK YOU!!! THANK YOU!!!! SOOOOOOOO MUCH!!!! For breaking down the information in a manner that I can actually understand it!!!! Thank you for the subtitles too!!!! You're soooo awesome!!!!

[Bwhy09]

Awesome man! This was so well put together. I just learned more in the last 13 minutes on here than i learned in 4 weeks of class... THANK YOU!

[me78829]

thank you soo much. this helps me a whole lot. you sir, are awesome!!

[rastegara]

Khan is the definition of prestige.

[LooneyToon00]

thanks so much ur awesome keep making videos!!!!!

[gothicfreakinusa]

I do not know what i would do without this videos!!

[platinumsparkles]

how does he write so good on the computer?

[cultralfreak]

@platinumsparkles I think he uses a writing pad :-)

[alexpapas5]

I am getting an A in bio because of you!!.

Thank u

[ogum536]

you really like color... hahaha

[Katherine5448]

im literally in love with this man

[MeMariaaa]

@Katherine5448 haha i know right!! :D

[BikinisInEnglandGS]

RAHH TEST TOMORROW

[cheezepwnzer]

38 atp? i thought 32 was generated :/

[mjordan072]

@cheezepwnzer My class is teaching that 32 are generated too, so you probably heard right. 38 can be generated in certain organisms but in eukaryotes it's 32 according to my prof

[XxKnine]

@mjordan072 i think 36-38 are more theoretical but actually around 30 atp's are generated cuz of loss of hydrogen atoms

[jamessandison]

@mjordan072 @cheezepwnzer depends if you use 1.5 or 2.5 for the ATP count as some books do, or 3 ATP and 2ATP per count.

[spyman144]

What about pyruvate oxidation? Pretty sure you skipped it...

[royepis1]

thank you so much!! why my university doesn't have a teacher like you!!



[royepis1]

thank you so much!!

[Elijahkings100]

Thank you very much professor . I am learning much from you and starting to actually understand my lessons. I thank God for you :D

-God Bless

[KissMyHerpes1]

FADH2!!!

[aerolove1990]

You just made my night!!! Thank you!!!

[lovefaithpurity]

omgosh you teach the whole cellular respiriation cycle in less than an hour! its better than spending a weeek at schooll!

[TheMikaela1992]

god bless you...

[PivAd123]

You're helping my Biology raise from B to A. Thanks

[Tshudo1]

nice and simple

[thatgirlkendalll]

thanks for the help on my exam on friday.....you explain it better than my professor...

[KloudyPK]

how can you be so good in every subject????

[tepork123]

@KloudyPK Because he graduated from Harvard University. lol

[mianus11]

10 people failed their test b/c they didnt pay attention to this video.

[MikoVaniCan]

Hey sal, amazing video thanks a lot for this! Just want to know, what about the Link Reaction? Thanks again

[ambertidewda]

This is awesome! Sooooo much better explained than my wordy textbook. Thanks!

[THISISSPARTA827]

Thanks, I just need to look up this video whenever I need help! ;D

[johnny0jon]

I love how simplified this is... Makes me feel smart (even though Biology is my worst subject)

[uru39]

you have reeeeeally nice handwriting :)

[viney03]

wooo ! i just can't sleep imagining our unitest results . kinda stressing me out !

[emsyFAULK]

this is amazing!! ;) you explain it very well :)

[MrVargasesteban]

im in 12th grade in this moment and biology was really hard for me in 9th grade, i wish i knew about khan academy back then...

[SophiaCyx]

Thank you so much :)

[LPLZcover]

i dont unterstand English so much but this video really help me about Biology :)

Thank you so much !!!

[achams123]

Hey Sal, just to clarify something for you. 38 ATP's are generated by aerobic prokaroyotes and 36 ATP's are generated from aerobic eukaryotes. The reason for this is because in eukaryotes the 2 NADH's that are generated during glycolysis in the cytoplasm need to traverse the mitochondria membrane in order to take place in ETC. The NADH's traverse the mitochondrial membrane using a porin channel that needs one ATP per NADH. Since proks dont have membrane organelles they save these 2 ATP's.

[teaphamxy]

Thanks you

[cyberq24]

thankyouthankyouthankyouthanky­outhankyouthankyouthankyouthan­kyouthankyouthankyouthankyouth­ankyouthankyouthankyouthankyou­thankyouthankyouthankyou!!!

[iNicoTECH]

Awesome tut!