The Pacemaker Potential of the SA Node and the AV Node

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www.interactive-biology.com - In this episode, I talk about how the Pacemaker Potential results in the signal that causes the heart to beat. I show how the greater conductance for Sodium ions in the Pacemaker Cells in the S.A. Node cause the cells to depolarize, opening voltage-gated Calcium channels when the membrane potential reaches threshold. This results in the action potential. Then Potassium channel open, letting Potassium ions leave, repolarizing the cells.
➟ Video Chapters
00:00 Intro
00:25 The Sinoatrial Node (SA Node)
01:20 The Atrioventricular Node (AV Node)
01:45 The Pacemaker Potential
01:52 Purkinje Fibers
02:21 Pacemaker cells
02:37 Action Potential
03:39 Repolarization
04:35 Signals resulting in heart contraction
04:53 Summary
Enjoy!
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14 июл 2024

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Комментарии : 235

@artembluntzki7376 11 лет назад

Thank you. You just saved me a possible 40 minutes trying to figure out what my textbook is trying to tell me haha, 20 minutes of aimlessly staring into the pages and another 20 trying to read half latin/greek derived words. You display complex effects in simple terms and still manage to include all the crucial information.

@guytelfer1353 Год назад

Still you should read about it also

@MagicOatmeall Год назад

@@guytelfer1353it’s been 10 years 😭

@b05620 11 лет назад

You save my life. I'm a working child and I end up missing a lot of class so these videos really really help me. Plus, you make things easy to understand and give a reason for everything which in turn makes it super easy to follow.

@laurasteele6340 10 лет назад

This video simplified the SA/VA sequence perfectly! I think I'll stop reading my A & P text book, and instead, watch every video you have created. Thank you for making this process interesting instead of complicated!

@sabaali457 5 лет назад

two years of med school, and only one video (yours) helped me understand! Thank you so much!

@tommymoore5969 11 лет назад

You are an awesome individual to take the time to put all these videos. And you make it so simple and easy to understand without getting lost. Thanks MUCH!!

@InteractiveBiology 12 лет назад

@mlalramhluna Thank you. It's what Leslie's main goal is, to be able to share his knowledge to those who need them. Glad that you're finding value in his videos. Stay tuned for more Biology fun!

@nehemiahbarnabas-pb8uk 9 месяцев назад

Couldn't figure the answer to the question Sir... How do I get to know?

@koruptxshun 10 лет назад

Wow. That was so unbelievably clear. Thanks for making such a complicated concept fun and so easy to understand!

@SS-wt1gn Год назад

I've been watching a few video of yours on the heart and have managed to learn more from you in a few simple minutes than I have all semester. Thank you so much for your hard work and effort it truly shows and I seriously appreciate you and wish you everything good in this world. Thanks to you I'll be able to ace my exam next week. You've literally taught and helped out so many future students, nurses and doctors!

@InteractiveBiology Год назад

I'm so excited for you. Glad the videos have been helpful. Wishing you all the best on your exam.

@SS-wt1gn Год назад

@@InteractiveBiology Thank you!!!

@InteractiveBiology Год назад

You're welcome.

@jenjen3710 12 лет назад

just want to say thank you for making my life SO much easier 'cause I have an exam thats going to be 18 chapters...I don't know how I will read it all. THANKS a lot :D

@izzie.bellie 8 лет назад

Thank youuuuu for making it simple and short! Awesome for cramming!

@ZAR1411 11 лет назад

I just love how this particular person gives free lectures plus all the interactive are very easy for me to understand..keep up the good work leslie! You're making everyone's life easier :)

@madej1858 12 лет назад

i got 87.5 on my first lecture exam , i used your information and i guess it works out really well.... you don't need be a rocket scientist to understand this.:)

@captainicehockey 11 лет назад

Thank you for your help. I'm a paramedic student and you broke down the depolarizing-repolarizing ion involvement very well for me to understand (we are currently beginning to analyze ECGs).

@kingswood331 12 лет назад

All these videos are great. Please keep them coming. You are making learning a lot easier!

@moondance5234 5 лет назад

One listening to this and I understand immediately, after reading 5 times in textbook I still don't know what they are talking about, lol. Thank you, you biology master! I wish you all best

@squishyshazzy 8 лет назад

Short, detailed and concise. Thanks a bunch!

@princeoz17 11 лет назад

simple, concise and easy to understand. Very helpful, thank you Leslie

@Elnora4ka 12 лет назад

That is so helpful! now I finally understood how that system works! Thank you!!:)

@MissEhouse 12 лет назад

You are A-Mazing !! These videos help with almost every part of my physiology textbook.

@dbscout 12 лет назад

Great vids. BS in bio, prepping for PA school, love these videos. Really great physio refreshers.

@Kriissttaccyy09 11 лет назад

Amazing videos. Thank you so much. Making my classes so much easier to understand!

@InteractiveBiology 12 лет назад

@MissEhouse Thank you! GLad that you seem to be finding value in the videos. Stay TUNED. WE have more Biology videos soon!

@happyhaylee1993 8 лет назад

Excellent video- this was really helpful, thank you!

@jaenaclairecabrera 8 лет назад

This helped me so much. Thank you!

@XDXDXDXDXDXDXD 10 лет назад

That was wonderfully informational.

@layla7843 4 года назад

Thank you..that was amazingly simple.

@thealmassi1 11 лет назад

There are two types of cardiac muscles: contractile muscle cells and autorhythmic muscle cells. Contractile cells make up 90% of muscle cells in the heart and autorhythmic cells make up 10% in the nodes. Autorhythmic muscle cells start the action potentials from the SA and AV nodes that disseminate into contractile cells causing them to contract. InteractiveBiology described the action potential of autorhythmic cells, you described contractile cells. Hope this helped :P

@loladify 11 лет назад

Very informative and to the point. Thank you

@sweetheartbreaker09 7 лет назад

I am happy! Thank you for this!

@AnnieHeijna 11 лет назад

Thanks so much for putting this up. Appreciate it so much. Bless you.

@amakachinwe5711 10 лет назад

This video was amazing thank you!

@slLLyhumans 13 лет назад

Great video , thank you !

@acaii9875 9 лет назад

Please continue doing what you do! I love your videos and they are soon HELPFUL!!!! Thank you for helping me understand human physiology, the videos help me pass the class.

@4mr4goldfish4ily4 3 года назад

brilliant. thank you!

@DannyWiratama1987 11 лет назад

all these videos are great. thank you!

@hummarohail4152 8 лет назад

explained in an amazing and easy way its really a fun to study biology with such teacher

@artnHim 11 лет назад

Thank you!! You made it so easy to understand!

@HaneenA91 11 лет назад

perfect! thanks for this effort.

@mustafairgsous6303 4 года назад

man you are the best in describing thank you

@ginarimbey8203 12 лет назад

Excellent! thank you.

@judearbes763 10 лет назад

i love your videos they are truly helpful and they have made it a lot easier for me to understand your particular topics... more power sir!!!

@InteractiveBiology 10 лет назад

Glad to hear you are finding value in the videos :)

@serbanz8873 8 лет назад

+Interactive Biology sir is sinoatrial is good to my health??

@meagenmichell6379 6 лет назад

Awesome video! Thank you!

@julianadurandelgado6426 9 лет назад

This was so... helpful. thanx a million :)

@prithvirajan2010 9 лет назад

U are amazing. !! Thank you!!

@alejandrajuarez8804 11 лет назад

Great Video! Definitely helpful, thanks for posting

@hiranya1234 12 лет назад

AMAZING! THANK YOU!

@rafaeisenlohr 11 лет назад

Very helpful!! Thank you!

@exo-baekhyuneesnimnim8506 3 года назад

Thank u so much, Sir.

@InteractiveBiology 12 лет назад

@Elnora4ka You are very much welcome. Glad it helped :)

@smallcatbigmeow 3 года назад

This was so helpful thank you!!!

@msvang1988 11 лет назад

You did a great job. Very very useful.

@AtomicPeach 3 года назад

I can’t believe this nine year old video was so helpful you truly are amazing!

@InteractiveBiology 12 лет назад

@HoneiiDiiva Glad to hear. All the best on your exam. Let me know how it went!

@MrVuittons 10 лет назад

Your movies are great! They are really helpful to me. You explain everything very clear and you summurize everything at the end, which is very nice. I only have one question: what happens to the Calcium ions, which rush into the pacemaker cells?

@Ninjastorm393 9 лет назад

Sharing knowledge is noble work. I thank you very much for ur every effort here. keep it going.

@zemasound5948 3 года назад

thank you sir!

@ajay176v 10 лет назад

Nice video!!

@superjenny 10 лет назад

this was awesome! thank you so much

@Kristy1123 9 лет назад

thank you! understand it so much better now :)

@merrymahmood4211 4 года назад

Thank you !

@vavila16 11 лет назад

THANK YOU :) oh this helps me visually . I could not understand what contraction meant (i speak a different language) but seeing the first part now this really helps more than the text book and the lecture audio from my instructor

@Marahxtb 8 лет назад

Thank you so much!

@ahfaz6183 4 года назад

Amazingly helpful vdos

@kshivam9 3 года назад

amazing . thankyou . it was of great help .:)

@wernerrojo7321 Год назад

That was excellent, thank you so much, understood that a lot easier than my lecture!

@InteractiveBiology Год назад

Awesomeness 👍🏾

@americandragonecko 12 лет назад

Awesome! This helped a lot!

@drtiarafazlin 13 лет назад

u just saved my life!

@baqerhablan 11 лет назад

thank you so much that was a great help ^^

@sheaownz 13 лет назад

thanks! its helpful

@kunanaik1665 3 года назад

Thank you sir

@chriswestrud2800 7 месяцев назад

A great video,ez to understand.

@InteractiveBiology 7 месяцев назад

I'm so glad this was helpful for you, @chriswestrud2800. My goal is to make biology as clear as possible. If you want more explanations like this, make sure to subscribe - I have a ton more on the way!

@nj6694 11 лет назад

THANK GOD FOR YOU! VERY HELPFUL

@user-rr8eq5sz8x 8 лет назад

good explination 👏👏 thank you ❤

@benz8076 9 лет назад

Thanks, man!

@arjunachu5633 6 лет назад

This video helped me a lot for my biology test

@TracyMinJunYu 8 лет назад

So awesome. I love it.

@MultiMusik4 9 лет назад

thank you very much . I had a big problem with understanding :)

@moshman1000 8 лет назад

Super easy to follow! I'm hoping your videos help me for my A&P exam tomorrow!

@djboo7779 Год назад

Sir, you are amazing.

@InteractiveBiology Год назад

Why thank you, DJ Boo. You are encouraging. Glad you find the video helpful. Make sure to subscribe for more.

@InteractiveBiology 13 лет назад

@petercourt That's a great question. I'm actually not sure that I know the answer to that one. I tried looking it up, but couldn't find that. My assumption would be that there is a Calcium pump in the membrane that pumps it back out. That would make sense and would cause there to be a driving force for Calcium ions to move back into the cell.

@memobadr4933 3 года назад

Amazing ❤

@MK-rt1ec 10 лет назад

Amazing human body. سبحان الله

@InteractiveBiology 13 лет назад

@greenranger8100 You are VERY much welcome. Glad to know it's helping. All the best, and stay tuned for many more in the future. Make sure to subscribe!

@hkennedy628 9 лет назад

awesome video! Very helpful for y graduate course in cardiovascular physiology.

@SilvieOlgan 11 лет назад

i have an exam tomorrow and this is great! :D

@dr.pradeep402 3 года назад

I was 8 years old then U r legend for me who was Of 16 17 years in 11th class.

@digiconvalley 12 лет назад

thankyou very very much

@russiadaniel1314 11 лет назад

Very informative I love your videos, Keep them up

@brilliantfuture1841 3 года назад

Thanks 🙏🏻

@ibrahimabubakar8275 8 лет назад

THANKS FOR THE XPLNN I REALLY LIKES UR XPLNTN

@veganthestephen 12 лет назад

I like your series of videos but in this case, you really should explain how the Na+/K+ pump works in the pacemaker cell first to set up the potential gradient before the voltage sensitive K+ channels close while the Na+ is still pumped out. At this negative membrane potential, the Na+ starts to flow into the cell against the concentration gradient by diffusion, thus activating the potential of the cell which is the cause leading to -40mV where Ca+2 ions start flooding in.

@what_do_you_want898 2 года назад

thank you so much😭😭😭🙏🙏🙏🙏

@InteractiveBiology 2 года назад

You’re very much welcome

@Denisey411 11 лет назад

wow u are amazing!!!!!!! than you from those of us who have bad teachers!!

@mariettevanjaarsveld4006 Год назад

Every time Lesley. Life changing 🎉

@InteractiveBiology Год назад

Yayyyy. Glad to help, Mariette. Thanks for the encouraging comment.

@zeinaawni2729 9 лет назад

Thank you , Really helpful keep going

@sanamajeed6581 3 года назад

Thank You so much Sir

@mimikebere4215 11 месяцев назад

Thank you 🙏

@InteractiveBiology 11 месяцев назад

I'm so glad you found it helpful, mimi. You are welcome. If you haven't already, make sure to subscribe to the channel because I have a lot more content like this coming to help you understand how the human body works.