Passive Diffusion, Facilitated Diffusion, Active Transport

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Vincent souvik Gomes Thanks Vincent! Glad you like it :)

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Hyper tonic and hypotonic difference

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[@telepcanin2878]

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?

[@tellntales4750]

I think 3

[@rejoythomas7925]

3

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You are Great lecturer . You makes it easy to understand . Thank you so much.

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Progress,

[@yagmurcamd]

Amazing,

[@sea5205]

Your channel is definitely the best!

[@gabichinaglia]

brazil heeeere! thanks for the help!

[@pogikotalaga7767]

Where does the cell get energy for active transport processes?

[@brokenwings2.056]

Very easily understandable..✌️

[@diyajain3070]

Isn't water polar? Then how can it travel across the membrane without a transmembrane protein?

[@playguy6714]

There is integral protein called aquaporine. This protein stabilises H2O concentration.

[@danceflood2880]

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...

[@abdaddy94]

Doesn't water require aquaporins to passively diffuse across the cell membrane, thus requiring an integral membrane protein?

[@abdaddy94]

Abdullah Murad @6:20 ish

[@AKLECTURES]

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.

[@ARTDEVGRU247]

@SanniA the hydrophobic aspects are facing the insides of the membrane.

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Sir,really i dont know what i say,u are great,ihave no word,u do much hard work,every type lec founded on your channel,great❤👍👍👍

[@nazlkarac5367]

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

[@vishantlama524]

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 ?

[@lyyn8545]

anyone got a summary of this?

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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

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ur da best

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Chan. Dhan

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I'm gonna tell my kids you're Einstein!

[@LogarAcc]

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?

[@sea5205]

YT LogYt co-transport

[@dhandhan8633]

Dhan

[@VIDYASAGAR-of2wt]

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.

[@playguy6714]

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.

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the best always!

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Thanks! :)

[@anshuthakur2656]

What is the difference between permeases,carrier and pump?

[@Sham_mostlychic]

It’s very helpful sir Thank u so much

[@misskaba4792]

you have a gift of teaching. bless you!

[@josephajrab2839]

Water goes through Aquaporins Integral Proteins channels which makes water Passive transport not passive diffusion

[@zahidhasan7268]

small amount go through passive transport.. he uses this example

[@anthonyvolotsenko3178]

Awesome help. Thank you!!!

[@supernovachampions]

Thanks for the clear concise explanation!

[@the7thnarrative126]

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..

[@mallakaljarawen888]

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

[@playguy6714]

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.

[@Freshone69]

very helpful, thanks

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God bless you 🤲🤩

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wow! A good presentation.

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thanks so much,,

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Thinks 👍💎

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Nice

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thanks ;-)

[@rashashelma8631]

are transport proteins same as channel proteins?

[@nofarmarom1306]

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.