Active Transport | Transport in Cells | Biology

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  • Опубликовано: 8 сен 2021
  • #Transport #ActiveTransport #CellMembrane #CellMembraneTransport #CellBiology #cellularbiology
    Active Transport | Transport in Cells | Biology
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    ▬▬▬▬▬▬▬▬▬▬ 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.
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Комментарии • 115

  • @DoctorNajeeb
    @DoctorNajeeb  2 года назад +10

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    @ramabordawekar495 2 года назад +8

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    • @DoctorNajeeb
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    Extra ordinary personality ❣️❣️ my favorite teacher ever in my life

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      That's the best feeling ever! Thank you so much 😘💖

    • @azizrocky2335
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      @@DoctorNajeeb always Wlcm sir and Thanks for sharing such a great video in ur channel

  • @saimamasood1710
    @saimamasood1710 2 года назад +6

    Love from Pakistan to most learned and beloved Dr. Najeeb
    Please upload more often

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +3

      New lectures are being recorded and will be uploaded soon. Stay tuned! 💗😘

  • @clinicalpediatrics
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    Dr Najeeb the Great

    • @DoctorNajeeb
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      Thank you for such a lovely compliment! 💗🤗

  • @aaquibkhan6258
    @aaquibkhan6258 2 года назад +3

    Best teacher I have ever seen in my life
    Thanks a lot sir you are genius
    you can make anyone a doctor

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thank you for your love and support. Stay blessed❤️🙂

  • @shahiddar5652
    @shahiddar5652 2 года назад +5

    Dr Najeeb in each lecture
    "So what really happens"❤

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +2

      Happy that you feel this way dear one! 💗🤗

  • @chikatimallagayathri2064
    @chikatimallagayathri2064 2 года назад +5

    Sir am such a student like I always been seeing your vedios every time... Everytime... Thank you so much sir

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +3

      Glad that you love them every time! 💗😘

    • @chikatimallagayathri2064
      @chikatimallagayathri2064 2 года назад +3

      @@DoctorNajeeb sir am so so so happy. Sir that you given reply to my comment....

  • @premsanthoshdaswani3476
    @premsanthoshdaswani3476 5 месяцев назад

    This explanation of the intertwined primary and secondary active transport mechanisms was simply mind blowing❤❤

    • @DoctorNajeeb
      @DoctorNajeeb  5 месяцев назад

      Glad to hear that you loved my teaching methodology ❤️❤️

  • @mahindra123456789
    @mahindra123456789 2 года назад +4

    Excellent video! It is concise, entertaining, very clear, and overall eduational

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Appreciate that a lot! Stay tuned and stay blessed ❤️

  • @OmarFaruk-gm5mw
    @OmarFaruk-gm5mw 2 года назад +2

    you are the best..you have made our medical life amazing.

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      A pleasure to have such great students like you. Keep sharing your feedback. Stay blessed ❤️

  • @sheebajamshead8633
    @sheebajamshead8633 2 года назад +4

    Lots of love and respect sir ♥️from Pakistan♥️

  • @madhurajkumar7414
    @madhurajkumar7414 2 года назад +2

    Really the master piece video sir..

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      I sincerely appreciate ❤️ Keep supporting❤️

  • @Kabir_Khayer
    @Kabir_Khayer 2 года назад +2

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    Sir y are the magical person.
    .
    Your concepts is osm. Sir..

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Love it when dear students rhyme for me! 💖

  • @hiddensoul7349
    @hiddensoul7349 2 года назад +2

    Thank you so much Sir 🙏 for teaching us critical concept in a very easy way 🙏❤️😌😌 ❤️best biology teacher ever ❤️Love from India 😌❤️

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thank you so much for your love and support. A pleasure to have such great students like you. Stay blessed ❤️

  • @arishasattar949
    @arishasattar949 2 года назад +2

    You are soo good at explaining things.

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      Glad to know that. Stay blessed ❤️

  • @mdbabarkhan9402
    @mdbabarkhan9402 2 года назад +3

    Sir you are a extraordinary teacher
    Lot of respect to you sir.

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Appreciate that a lot! Stay tuned and stay blessed ❤️

  • @kongkong4598
    @kongkong4598 2 года назад +3

    Just one line for u, UR a blessing for medical students ❤

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      All because of your love and support! ❤️💜💚🧡🖤💛💙

    • @kongkong4598
      @kongkong4598 2 года назад +3

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    • @DoctorNajeeb
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      Inshallah we'll meet one day! ❤️💜💚🧡🖤💛💙💕😘

    • @kongkong4598
      @kongkong4598 2 года назад +2

      @@DoctorNajeeb insha allah ❤

  • @samsbiology7493
    @samsbiology7493 2 года назад +1

    MashAllah Allah ap ko mazid kambiyan day

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thank you so much. Stay blessed ❤

  • @dilmiupeksha6027
    @dilmiupeksha6027 Год назад +1

    Thank you very much sir...🙏🙏🙏🙏🙏🙏🙏.....I understood the lesson very well.......❤❤ you're teaching method is great and excellent sir... Thank you once again.🙏🙏🙏

    • @DoctorNajeeb
      @DoctorNajeeb  Год назад

      It's my pleasure to have such great students 😊 Stay blessed ❤️

  • @anubhutiroll-1013
    @anubhutiroll-1013 2 года назад +2

    One of the Legend of Medical World

  • @mkkhaann
    @mkkhaann 2 года назад +2

    Legend of Medical World 💗

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Amazed to know that you feel this way! 💖🥰

  • @ArYaN-bx2tm
    @ArYaN-bx2tm 2 года назад +3

    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.
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    Love from Bihar,India

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      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! ❤️💜💚🧡🖤💛💙

    • @Somaliland-First
      @Somaliland-First 2 года назад

      Your link is not working for me! Would you please help me?

    • @ArYaN-bx2tm
      @ArYaN-bx2tm 2 года назад +1

      @@DoctorNajeeb sir I have done as you said

  • @rizwankhattak5015
    @rizwankhattak5015 2 года назад +1

    thank you so much sir

  • @dolenakhatunriya3327
    @dolenakhatunriya3327 2 года назад +3

    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.

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      Lot's of love and prayers for you dear! ❤️💜💚🧡🖤💛💙

    • @dolenakhatunriya3327
      @dolenakhatunriya3327 2 года назад +2

      @@DoctorNajeeb thanks a million SIR..

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      Your always gonna be in my prayers!💕

    • @dolenakhatunriya3327
      @dolenakhatunriya3327 2 года назад +2

      @@DoctorNajeeb Again thanks Sir for inspiring me so highly.

  • @HARPIT979
    @HARPIT979 2 года назад +1

    Love and support from india rajasthan

  • @suzanwanjiru3989
    @suzanwanjiru3989 2 года назад +2

    Very well explained 👍👌

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      Glad you liked it! stay blessed ❤️

  • @ikramullah9020
    @ikramullah9020 2 года назад +2

    Great job sir

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thank you so much! ❤️❤️❤️'

  • @santughosh8676
    @santughosh8676 2 года назад +2

    Every time best lecture ever❤️❤️❤️❤️

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      Thank you for the appreciation! 💗🤗

    • @santughosh8676
      @santughosh8676 2 года назад +1

      @@DoctorNajeeb most welcome ❤️

  • @NitinSharma-ns7zx
    @NitinSharma-ns7zx 2 года назад +3

    Amazing sir 👍🏻

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Keep watching and stay blessed! 💖

  • @kaifkeerio1479
    @kaifkeerio1479 Год назад +1

    Helpful

    • @DoctorNajeeb
      @DoctorNajeeb  Год назад

      Glad to hear that❤ Stay blessed ❤

  • @farjanashimu3662
    @farjanashimu3662 2 года назад +1

    Thank you

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      You are most welcome! Stay tuned for upcoming lectures and stay motivated. ❤️💜💚🧡🖤💛💙💕😘

  • @fidamuhammad7790
    @fidamuhammad7790 2 года назад +1

    Sir you are the best

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thank you for your kind words💖

  • @maabbahar841
    @maabbahar841 2 года назад +1

    Great job

  • @rajuahmad61
    @rajuahmad61 2 года назад +1

    sir u r great in the world....

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Flattered to know that dear student! 💗🤗

    • @rajuahmad61
      @rajuahmad61 2 года назад

      @@DoctorNajeeb you reply me........!!!how it is possible!! unbelievable!! !ohh my Allah.. tnx sir.

  • @4amgaming477
    @4amgaming477 2 года назад +2

    Great teacher

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thank you! It means a lot to me 💗😘

    • @4amgaming477
      @4amgaming477 2 года назад +1

      @@DoctorNajeeb ❤️

  • @mahmudulhasan690
    @mahmudulhasan690 2 года назад +1

    My teacher's teacher❤️❤️🇧🇩🇧🇩

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thank you so much for your love. Stay blessed 💖

  • @arohisth4551
    @arohisth4551 2 года назад +1

    tysm

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      You are most welcome! Stay tuned and stay blessed 💗🤗

  • @Nirvana20202
    @Nirvana20202 2 года назад

    ♥️ Good one sir

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thanks for liking. Keep supporting ❤

  • @Armwrestler_646
    @Armwrestler_646 2 года назад +1

    You are too good 💓💓

    • @Armwrestler_646
      @Armwrestler_646 2 года назад +1

      Sir aap kha padha te hoo kon si University may India may nhi ho na please reply

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      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. 💓💓💓💓

    • @Armwrestler_646
      @Armwrestler_646 2 года назад +1

      Ok sir

  • @sakanderalimirza8777
    @sakanderalimirza8777 2 года назад

    Good

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Thank you for your love and support. ❤️

  • @RkBaror
    @RkBaror 2 года назад +1

    Sir I am life time membership Sir but your app lecture not update because new lecture not seen only old lecture please solve sir

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Kindly contact my team support@drnajeeblectures.com 💕😘

  • @bhatwasim2831
    @bhatwasim2831 2 года назад +1

    Love from Kashmir.

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Glad to hear that. Stay blessed Appreciate that a lot! Stay tuned and stay blessed ❤️

  • @aakashjha769
    @aakashjha769 2 года назад +1

    ❤️

  • @noorpeeya9940
    @noorpeeya9940 2 года назад +1

    ❤️❤️❤️❤️

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад +1

      ❤️💜💚🧡🖤💛💙💕😘

  • @chikatimallagayathri2064
    @chikatimallagayathri2064 2 года назад +1

    Sir I have a doubt

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      If you have any queries then contact my team support@drnajeeblectures.com 💕😘

  • @kyawgyi1872
    @kyawgyi1872 2 года назад +1

    Thank you alot sir

    • @kyawgyi1872
      @kyawgyi1872 2 года назад +1

      I'm from myanmar now listening ur lect all

    • @DoctorNajeeb
      @DoctorNajeeb  2 года назад

      Your always welcome dear one! Keep watching and stay motivated ❤️💜💚🧡🖤💛💙💕😘