Dear AK! I'm a biology major, and I just wanted to thank you. Your lectures really help me understand some of the more complicated things, from biochemistry to physiology... you are a great teacher, and your schemes are amazing! Know just how much you are appreciated. Keep on posting lectures and spreading knowledge :) thanks again!
Man, u are the best. I felt so dump when I stepped outside my last biology class. However there was some hope that there is definitely going to be AK LECTURE video on this lesson. U have made my life much easier. Keep it up!!! And also ur videos and notes at back are best !!!
till nw i was nt getting this topic(TRANPORTATION IN PLANTS)at all but after watching ur vedios its all clear.. thanks a lot dude. ur way of teaching is awesome my name is kshitij tyagi m from india...
Hi, I understand that fats are non polar and they can diffuse easily through the cell membrane. But aren't Fats huge molecules with many side chains . Will the bulky fat molecule still have a chance to diffuse out easily through the semi permeable cell membrane ?
I had question on Pharmacology test that goes like this: Which of the following will use faciliated diffusion when crossing cell membrane: 1) unionized hydrosoluble molecule 2)unionized liposoluble molecule 3)ions and large hydrosoluble molecules 4)ions and large liposoluble molecules Any help?
Abdullah Murad No. Although there are water porins that help water move quickly, water can diffuse across the membrane without the aid of any protein channels.
I'm first year in medicine and your lectures have helped me over and over again :P I have a question, tho... The only kinds of transport are: Active transport, Passive Transport, and Endocytosis-Exocytosis? Or am I missing something?
Facilitated diffusion And active transport Both of them use channel protein and carier protein.channel protein for Small polar molecul .carrier protein big polar molekül.??can you tell me please true or not
I am a bit confused 😕. Water is a polar liquid right? So the transport of water molecules needs the help integral proteins and not the other way round like you stated. I need help pls..
Sir polar molecules can not cross pm and water is a polar molecule then how it will go directly through lipid bilayer of pm. Does it also move through a integral protein like aquaporins and if the and is yes then you mentioned movement of water do not require any integral protein (osmosi) and as we also know the tail part of lipid is hydrophobic then how it allow the water molecule to pass through it as you also shown in your diagram where water molecule directly crossing the lipid bilayer instead of crossing through any proteins like aquaporins and if water can cross directly then what is the use of aquaporins.
Water molecules are really small compared to saccharides. Even tho It's polar it passes throught cell membrane, it's really slow. In order not to develop problems connected to aerobic respiration we got aquaporin.
No. They are two kinds of proteins to transport molecules across the lipid bilayer: Transport Proteins - binds the molecule to its binding site and changes its conformation to "flip" its sides so the molecule can pass through. It is also knows as a facilitated diffusion. Transport protein are carrier proteins that are known as the active transorters (energy required, most likely in the form of ATP; like sodium - potassium pump). An ex. for carrier protein that requires an energy that is not ATP is the Sodium - Glucose Pump, which is known as the Symporter. Ion Channels - do not require an energy input in order to transfer the the molecule to the other side. Channel Proteins are always passive and will have their "gates" open all the time. However they are highly selective to their own ions. Example for this would be the Potassium Ion Channel, which is highly selective and favors the K+ Ion to pass through it. I hope that helps.
I got a high grade on Biochemistry because of you. I'm now studying for Physiology starting on this video and I really missed your voice!
Dear AK! I'm a biology major, and I just wanted to thank you. Your lectures really help me understand some of the more complicated things, from biochemistry to physiology... you are a great teacher, and your schemes are amazing! Know just how much you are appreciated. Keep on posting lectures and spreading knowledge :) thanks again!
He is awesome, I should pay my tuition fees to him not my uni!
Hodaya Turgeman You've come a long way since making "The Good Night Sleepy" videos.
Thank you! Your character inspires me. And I have learned so much real science from you in the past two years. Thank you.
Man, u are the best. I felt so dump when I stepped outside my last biology class. However there was some hope that there is definitely going to be AK LECTURE video on this lesson. U have made my life much easier. Keep it up!!!
And also ur videos and notes at back are best !!!
i wish my teachers at school can explain like you :((((
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till nw i was nt getting this topic(TRANPORTATION IN PLANTS)at all but after watching ur vedios its all clear.. thanks a lot dude. ur way of teaching is awesome my name is kshitij tyagi m from india...
Very easily understandable..✌️
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Hi,
I understand that fats are non polar and they can diffuse easily through the cell membrane. But aren't Fats huge molecules with many side chains . Will the bulky fat molecule still have a chance to diffuse out easily through the semi permeable cell membrane ?
the way you explain is awsome!!
Vincent souvik Gomes Thanks Vincent! Glad you like it :)
Where does the cell get energy for active transport processes?
You look way better clean-shaven! Nix the stubble!
What is the difference between permeases,carrier and pump?
the best always!
Thanks! :)
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Hyper tonic and hypotonic difference
I had question on Pharmacology test that goes like this:
Which of the following will use faciliated diffusion when crossing cell membrane:
1) unionized hydrosoluble molecule
2)unionized liposoluble molecule
3)ions and large hydrosoluble molecules
4)ions and large liposoluble molecules
Any help?
I think 3
3
Doesn't water require aquaporins to passively diffuse across the cell membrane, thus requiring an integral membrane protein?
Abdullah Murad @6:20 ish
Abdullah Murad No. Although there are water porins that help water move quickly, water can diffuse across the membrane without the aid of any protein channels.
@SanniA the hydrophobic aspects are facing the insides of the membrane.
anyone got a summary of this?
Thinks 👍💎
I'm first year in medicine and your lectures have helped me over and over again :P
I have a question, tho... The only kinds of transport are: Active transport, Passive Transport, and Endocytosis-Exocytosis?
Or am I missing something?
YT LogYt co-transport
Nice
Facilitated diffusion And active transport Both of them use channel protein and carier protein.channel protein for Small polar molecul .carrier protein big polar molekül.??can you tell me please true or not
thanks ;-)
I am a bit confused 😕. Water is a polar liquid right? So the transport of water molecules needs the help integral proteins and not the other way round like you stated. I need help pls..
you are right >> water is a polar molecule so it does need an integral protein which called aquaporins and these proteins are kind of channel proteins
And because of low polarity (It's low because of two hydrogen molecules instead of one) it can go throught cell membrane, really slow tho.
Sir polar molecules can not cross pm and water is a polar molecule then how it will go directly through lipid bilayer of pm. Does it also move through a integral protein like aquaporins and if the and is yes then you mentioned movement of water do not require any integral protein (osmosi) and as we also know the tail part of lipid is hydrophobic then how it allow the water molecule to pass through it as you also shown in your diagram where water molecule directly crossing the lipid bilayer instead of crossing through any proteins like aquaporins and if water can cross directly then what is the use of aquaporins.
Water molecules are really small compared to saccharides. Even tho It's polar it passes throught cell membrane, it's really slow. In order not to develop problems connected to aerobic respiration we got aquaporin.
Isn't water polar? Then how can it travel across the membrane without a transmembrane protein?
There is integral protein called aquaporine. This protein stabilises H2O concentration.
U ve been of great help to me. I use ur note and lectures to tutor my course mate. I pray to be like u one day. #JACKOFALLTRADE
i love you
are transport proteins same as channel proteins?
No. They are two kinds of proteins to transport molecules across the lipid bilayer:
Transport Proteins - binds the molecule to its binding site and changes its conformation to "flip" its sides so the molecule can pass through. It is also knows as a facilitated diffusion. Transport protein are carrier proteins that are known as the active transorters (energy required, most likely in the form of ATP; like sodium - potassium pump). An ex. for carrier protein that requires an energy that is not ATP is the Sodium - Glucose Pump, which is known as the Symporter.
Ion Channels - do not require an energy input in order to transfer the the molecule to the other side. Channel Proteins are always passive and will have their "gates" open all the time. However they are highly selective to their own ions. Example for this would be the Potassium Ion Channel, which is highly selective and favors the K+ Ion to pass through it.
I hope that helps.
Dhan
I'm gonna tell my kids you're Einstein!
Chan. Dhan
Progress,
Water goes through Aquaporins Integral Proteins channels which makes water Passive transport not passive diffusion
small amount go through passive transport.. he uses this example