Active Transport | Transport in Cells | Biology
Вставка
- Опубліковано 8 вер 2021
- #Transport #ActiveTransport #CellMembrane #CellMembraneTransport #CellBiology #cellularbiology
Active Transport | Transport in Cells | Biology
Like this video?
Sign up now on our website at www.DrNajeebLectures.com to access 800+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM UA-cam). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $45 ONLY!
Sign up now on our website at members.drnajeeblectures.com/
---------------------------------------------------------------------------------------------------------------------------
Why sign up for premium membership? Here's why!
Membership Features for premium website members.
1. More than 800+ Medical Lectures.
2. Basic Medical Sciences & Clinical Medicine.
3. Mobile-friendly interface with android and iOS apps.
4. English subtitles and new videos every week.
5. Download option for offline video playback.
6. Fanatic customer support and that's 24/7.
7. Fast video playback option to learn faster.
8. Trusted by over 2M+ students in 190 countries.
---------------------------------------------------------------------------------------------------------------------------
▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
In cellular biology, active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration-against the concentration gradient. Active transport requires cellular energy to achieve this movement. There are two types of active transport: primary active transport that uses adenosine triphosphate (ATP), and secondary active transport that uses an electrochemical gradient.
Primary active transport, also called direct active transport, directly uses metabolic energy to transport molecules across a membrane. Substances that are transported across the cell membrane by primary active transport include metal ions, such as Na+, K+, Mg2+, and Ca2+. These charged particles require ion pumps or ion channels to cross membranes and distribute through the body.
Most of the enzymes that perform this type of transport are transmembrane ATPases. A primary ATPase universal to all animal life is the sodium-potassium pump, which helps to maintain the cell potential. The sodium-potassium pump maintains the membrane potential by moving three Na+ ions out of the cell for every two K+ ions moved into the cell. Other sources of energy for primary active transport are redox energy and photon energy (light). An example of primary active transport using redox energy is the mitochondrial electron transport chain that uses the reduction energy of NADH to move protons across the inner mitochondrial membrane against their concentration gradient. An example of primary active transport using light energy are the proteins involved in photosynthesis that use the energy of photons to create a proton gradient across the thylakoid membrane and also to create reduction power in the form of NADPH.
In secondary active transport, also known as coupled transport or cotransport, energy is used to transport molecules across a membrane; however, in contrast to primary active transport, there is no direct coupling of ATP. Instead, it relies upon the electrochemical potential difference created by pumping ions in/out of the cell. Permitting one ion or molecule to move down an electrochemical gradient, but possibly against the concentration gradient where it is more concentrated to that where it is less concentrated, increases entropy and can serve as a source of energy for metabolism (e.g. in ATP synthase). The energy derived from the pumping of protons across a cell membrane is frequently used as the energy source in secondary active transport. In humans, sodium (Na+) is a commonly cotransporter ion across the plasma membrane, whose electrochemical gradient is then used to power the active transport of a second ion or molecule against its gradient. In bacteria and small yeast cells, a commonly cotransporter ion is hydrogen. Hydrogen pumps are also used to create an electrochemical gradient to carry out processes within cells such as in the electron transport chain, an important function of cellular respiration that happens in the mitochondrion of the cell.
Join this channel to get access to perks:
Sign up now on our website at members.drnajeeblectures.com/...
/ @doctornajeeb
Follow us on Facebook :- / drnajeeb
Follow us on Instagram :- / drnajeeblectures
Like this video? Sign up now on our website at www.DrNajeebLectures.com to access 800+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM UA-cam). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $99 ONLY!
My dear I hope you contacted my team before the 21st of July because that was the last day for activation of $2 promotion but don't worry and contact my team support@drnajeeblectures that we had a conversation over here! ❤️💜💚🧡🖤💛💙💕😘
App is not working sir
My favourite! Wish we had more professors like him!
Thank you dear one! 💗😘
wish we had more full videos
Dr. Najeeb, you remind me of my high school teachers. They were loud, assertive, and clear. Discipline was dominant in the class room. The lesson was 45 min of pure attention and focus. They contributed a lot to my personality development and growth.
Glad to hear that. Keep sharing your feedback. Stay blessed ❤️❤️
Extra ordinary personality ❣️❣️ my favorite teacher ever in my life
That's the best feeling ever! Thank you so much 😘💖
@@DoctorNajeeb always Wlcm sir and Thanks for sharing such a great video in ur channel
Dr Najeeb the Great
Thank you for such a lovely compliment! 💗🤗
Sir am such a student like I always been seeing your vedios every time... Everytime... Thank you so much sir
Glad that you love them every time! 💗😘
@@DoctorNajeeb sir am so so so happy. Sir that you given reply to my comment....
Love from Pakistan to most learned and beloved Dr. Najeeb
Please upload more often
New lectures are being recorded and will be uploaded soon. Stay tuned! 💗😘
Dr Najeeb in each lecture
"So what really happens"❤
Happy that you feel this way dear one! 💗🤗
Best teacher I have ever seen in my life
Thanks a lot sir you are genius
you can make anyone a doctor
Thank you for your love and support. Stay blessed❤️🙂
Lots of love and respect sir ♥️from Pakistan♥️
Jazakallah Khairan! ❤️
Excellent video! It is concise, entertaining, very clear, and overall eduational
Appreciate that a lot! Stay tuned and stay blessed ❤️
This explanation of the intertwined primary and secondary active transport mechanisms was simply mind blowing❤❤
Glad to hear that you loved my teaching methodology ❤️❤️
Really the master piece video sir..
I sincerely appreciate ❤️ Keep supporting❤️
you are the best..you have made our medical life amazing.
A pleasure to have such great students like you. Keep sharing your feedback. Stay blessed ❤️
Sir you are a extraordinary teacher
Lot of respect to you sir.
Appreciate that a lot! Stay tuned and stay blessed ❤️
East or west Najeeb Sir is the best👍💯..
Sir y are the magical person.
.
Your concepts is osm. Sir..
Love it when dear students rhyme for me! 💖
Just one line for u, UR a blessing for medical students ❤
All because of your love and support! ❤️💜💚🧡🖤💛💙
@@DoctorNajeeb millions of fans are willing to have a meeting with u, or atleast hug🤗 u, I'm from India , i don't know whether my dream is going to fulfill by Allah or not 😗😚😚😙😙🤗🤗🤗🤗
Inshallah we'll meet one day! ❤️💜💚🧡🖤💛💙💕😘
@@DoctorNajeeb insha allah ❤
One of the Legend of Medical World
That's really heartening! 💗😘
@@DoctorNajeeb ❤️
You are soo good at explaining things.
Glad to know that. Stay blessed ❤️
Thank you so much Sir 🙏 for teaching us critical concept in a very easy way 🙏❤️😌😌 ❤️best biology teacher ever ❤️Love from India 😌❤️
Thank you so much for your love and support. A pleasure to have such great students like you. Stay blessed ❤️
Legend of Medical World 💗
Amazed to know that you feel this way! 💖🥰
Thank you sir ❤️ I'm in 10th class and your videos are extremely helpful to me . I know you might be thinking a student of class 10???
But it's true . Sir please continue to add the video in full format .The teaser videos aren't able to fulfill my needs and my parents won't provide me the amount of your video library.
Please consider my request genuine 🙏
Love from Bihar,India
Lot's of love and support for you my dear one kindly contact my team team support@drnajeeblectures.com and write an note that we had a conversation over here! ❤️💜💚🧡🖤💛💙
Your link is not working for me! Would you please help me?
@@DoctorNajeeb sir I have done as you said
Thank you very much sir...🙏🙏🙏🙏🙏🙏🙏.....I understood the lesson very well.......❤❤ you're teaching method is great and excellent sir... Thank you once again.🙏🙏🙏
It's my pleasure to have such great students 😊 Stay blessed ❤️
Sir now i am in class ten but i do your Class sometimes because i wanna be a medical student... Pray for me so that i can fulfill my dream.
Lot's of love and prayers for you dear! ❤️💜💚🧡🖤💛💙
@@DoctorNajeeb thanks a million SIR..
Your always gonna be in my prayers!💕
@@DoctorNajeeb Again thanks Sir for inspiring me so highly.
Every time best lecture ever❤️❤️❤️❤️
Thank you for the appreciation! 💗🤗
@@DoctorNajeeb most welcome ❤️
Great job sir
Thank you so much! ❤️❤️❤️'
Amazing sir 👍🏻
Keep watching and stay blessed! 💖
Great job
Appreciate that a lot! 💗🤗
MashAllah Allah ap ko mazid kambiyan day
Thank you so much. Stay blessed ❤
Very well explained 👍👌
Glad you liked it! stay blessed ❤️
Love and support from india rajasthan
Love you all 💗
sir u r great in the world....
Flattered to know that dear student! 💗🤗
@@DoctorNajeeb you reply me........!!!how it is possible!! unbelievable!! !ohh my Allah.. tnx sir.
thank you so much sir
Most welcome ❤️
Helpful
Glad to hear that❤ Stay blessed ❤
Great teacher
Thank you! It means a lot to me 💗😘
@@DoctorNajeeb ❤️
Thank you
You are most welcome! Stay tuned for upcoming lectures and stay motivated. ❤️💜💚🧡🖤💛💙💕😘
My teacher's teacher❤️❤️🇧🇩🇧🇩
Thank you so much for your love. Stay blessed 💖
Sir you are the best
Thank you for your kind words💖
You are too good 💓💓
Sir aap kha padha te hoo kon si University may India may nhi ho na please reply
My dear, we make online lectures and if you have any further questions then contact my team support@drnajeeblectures.com anytime! Thank you for the kind words. 💓💓💓💓
Ok sir
♥️ Good one sir
Thanks for liking. Keep supporting ❤
tysm
You are most welcome! Stay tuned and stay blessed 💗🤗
Good
Thank you for your love and support. ❤️
Love from Kashmir.
Glad to hear that. Stay blessed Appreciate that a lot! Stay tuned and stay blessed ❤️
Sir I am life time membership Sir but your app lecture not update because new lecture not seen only old lecture please solve sir
Kindly contact my team support@drnajeeblectures.com 💕😘
❤️
Thank you! 💗
❤️❤️❤️❤️
❤️💜💚🧡🖤💛💙💕😘
Sir I have a doubt
If you have any queries then contact my team support@drnajeeblectures.com 💕😘
Thank you alot sir
I'm from myanmar now listening ur lect all
Your always welcome dear one! Keep watching and stay motivated ❤️💜💚🧡🖤💛💙💕😘