Microtubules | Cells | MCAT | Khan Academy
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- čas přidán 25. 07. 2024
- Created by Efrat Bruck.
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I learned more in 13 minutes of your video than in 2 weeks of class, thank you very much!
maybe because you were playing to candy crush instead of listenning the teacher ? ( I am joking)
Can be taken OOf. I love the accent
I feel like Harley Quinn is teaching me cellular A&P. It’s appropriate
oof
UOFF
omg mee too
Bacaaaauuuse
Microtubule is a much more complex molecule. The building block of this protein is a dimer called tubulin, which is composed of two sub units: α-tubulin and β-tubulin. α-tubulin and β- tubulin form a filamentous chain called “protofilament”. Microtubules are built by arranging 13 such protofilaments around an empty core. This gives rise to a tube-like construction (hence the name microtubule), which is stiffer, longer and wider than actin. Microtubules have a distinct organizing site called the “centrosome”. Microtubule polymerization begins at this organelle. The end where faster polymerization occurs is called the plus terminus. The end where slower polymerization takes place is called the minus end. Microtubules grow from the centrosome towards the membrane, by anchoring their minus end to the organelle. Once microtubules reach the membrane they detach from the centrosome and create a highly dynamic network. The formation of this network is assisted by a group of proteins with microtubule binding domains called Microtubule Associated Proteins (MAP).
-Creative BioMart
That's exactly the kind of information I was looking for in this video, nonetheless it was a fantastic video, gave me more info than my professors did lol
Hey! May I know at what standard are you studying these Microtubules and stuffs? And from which country are you studying?😁
great...thankuu soo much...this helped me a lot.....stay blessed
Thanks
understood all the basic concepts .. cleared my head with all the doubts by watching your video..thank u !!
Very well presented. It is very helpful when so many details are presented in a way that is easy to retain. Thank you for a great video lesson.
A great presentation that takes a very dry textbook concept and makes is simple to understand and grasp.
wow- one of the best Khan Academy videos I've watched. thank you so much!
Wish i had a teacher like you at highschool...very well explained....
This is a phenomenal video! Well done! Thank you so much!1
now i understand the paclitaxol and the other taxols mechanism of action thank you so much
Great work Efrat! New York accent? I love it how you say "beezlebaddies"
Thank you so much, this video helped me a lot for a presentation!
thank you efrat, its really helpful x
You sound like you grew up in New York but now live in Canada
Kevin Bennett My thought exactly
This is a very helpful video of an otherwise very confusing subject. Thanks
It is very clear 💗 thank you so much.
Error at 3:13, centrosomes do not duplicate during mitosis, they duplicate during the S phase.
You 're right!
it duplicates in G2
DNA duplicate in s phase not centrosome
@@lukehoising6401 S phase of interphase along with DNA not during G2, microtubules are made during G2
This teacher makes everything so clear. Anyone knows her channel, please? I want to subscribe.
Time saving explanation... thank you so much
Correct me if I'm wrong, but aren't interpolar microtubules the ones that do not attache to kinetochores, but go from one MTOC directly to the other?
Interpolar microtubules are connected to the interpolar microtubules of the other MTOC. Kinetochor microtubulues bind the kinetochors. So I learned it that way, too.
All I got from this video was “OOOF” lol cool accent
I learned about microtubules AND Canadian accents today. Thank you!
Very clear and well presented. Thank you for your time and talent.
thank you, you are a lifesaver
Both the mitotic spindle and the interphase cytoskeleton are formed from rapidly tuning-over microtubule populations with half lives of less than a few minutes, which grow from and shrink towards the microtubule organizing centres.
great work
Clear accent , and explaining ,, choose this kind of people to explain the session
This vedio is very helpful for all of us who want to know more about microtubules very descriptively or elaborately...
you are great at teaching, thank you
this was a good job well done
One of the best khanvideo I have ever seen.
Great job!
I dont know if her accent is NYC or NJ, but I love it
ngithande nje izwi lakho ntokazi yomngisi....i learnt a lot from this video, thanks!
Extremely helpful
perfect.thanks
Much appreciated
Thanks it helps me a lot !!!!
This is so helpful for my AP Bio test!!! Thank you!!!
Hi is your degree finished...??
this was actually pretty good
I'm so grateful for this!
An excellent class.
thank you..
thank u so much buddy..... :)
Excellent clear clearest yet
Thank you for this video.
There is a mistake in your video. Interpolar microtubules are antiparallel microtubules that originate from opposite poles, and overlap at the midzone of mitotic spindles. They don't attach to kinetochores. The ones you showed are kinetochore microtubules. Would be good to make it clear that there 3 types of microtubules taking part during mitosis and they all have different functions.
Thanks
Just a small correction doesnt the microtubule arise from the pericentriolar material rather then then centriole ??
Love the jersey accent. Great video :)
it's new york
Thank you so much!
Thank you so much.
You are great.
why are there no more detailed videos on this :(
Brooklyn ? Queens ?? ...haha
Wow!!!
I liked her accent, but it took a while for me to understand when she was saying "anchoring" at 4:09 xD
9:19 I think there is something incorrect, in the 9+2 arrangement of the basal body the central microtubules are NOT paired as the other ones (1 complete and 1 incomplete microtubule, who attach each other). Indeed, the central "pair" is more like TWO SEPERATE and both complete microtubules, just connected by a bridge and not direcly attaching, as your drawing suggests. Pls correct me if I'm wrong.
Well explained.
Great illustration. I must point out that the centromere and kinetochore lead the motion, not the arm of the chromatids as illustrated.
Thank you
I just loved this video😍😍😭😭
Hi
There is a mistake in your video. The 'interpolar' microtubules in the video are actually kinetochore microtubules. The interpolar microtubules extend from opposite poles and meet each other somewhere around the center where they overlap and associate with motor proteins.
Lovely accent. 🤩
plzzz what aplication do you use ???
Neat :)
This was so good.
Hi
does this come up on the grade 12 course or biology 30? im in process of needed to redo mine dont wanna waste my time learning it, if i dont need to
Thanks a lot..i pass the test because of your video 🤧🤧
Got 15/16 🤗
URGENCY QUESTION: in the fungi, how chromosoms move in their nucleuses?
does the strips of duke transformed from cytoplasm to nucleus?
Coool, I never liked khan's but this lady overwhelm me, keep it up miss unknown u r doing great
Can also grow by branching, not just linearly
bring back khan!
Let me clear,, During synthesis phase(a phase of interphases) do the whole centrosome become double or only centriole become double?
Whole centrosome
@@kashish291_0 thanks
How do u spell dionene correct way and what would happen of some consumes more then that is required by the body and where is it devised from plants or animal what is the structure of it compound element ?
What would happen if tubular over grow do that me brain mass grows
What's this app u use for drawing?
Tnx for the teaching but signals did not go back they go forward from d dendrite to the axon terminal and then d axon terminal takes received signal to another neuron and so on continuously,,,,tnx again ma'am
Reminded me of school again. Lots of labelling of parts less actual explaining of how stuff actually works. Are those tubules in the neuron as she calls them "tracks" transporting electrical signals? Or something else.
kimura kano No electrical signals aren't "transported" and the tracks that she showed are within the cell. The actual electrical signals that neurons transmit are passed in its plasma membrane through a complex process involving ion channels.
Kudos to Lynn Margulis
That's a lot of protein names to remember
Amazing stuff - Thx.
How do most cells transport vesicles? Just in the cytosol, no railroads? Also what holds the organelles of a cell (nucleus ER, etc) in place? Is that microtubules?
Intermediate filaments hold the cell together I think, and the railroads you talk about, are microfilaments.
isnt it kinetOchore
Shouldn't it be cawled the 9 +1 arrangement?
very good video if u are student who got exam 2 days after
we actually say "2 days from now". The Word "After", makes it seem like you are studying after the exam has already ended.
I thought Centrosome wasn't an organelle? 2:12
Centrosome is absent in plants....how spindle fibers are formed in them
if microtubules are dynamic then how is their structure studied
slay video
waht is kinetichore ,i didn't get it
Is astonishing how much information is wrong on this internet
Anyone here to understand orchestrated objective reduction?
This girl’s from Brooklyn!?
you must be from Jersey with that accent !!!
kind of vague.i still dint get the main functios of microtubules
5:06 is this inside a cell or a nucleus?
This is a cell..
Cilia and flagella 9 + 2
Centriole 9 + 0
Fast and furious
kinetochore is spelt wrong, she spelt it with an i rather than an o
Great!! Thank you!! One correction: kinetOchore* (it's spelt with O, not I) :S
Since when does Harley Quinn teach a microbiology class?