Pacemaker Action Potential
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- เผยแพร่เมื่อ 17 เม.ย. 2021
- The pacemaker action potential provides the automaticity to our cardiac pacemaker cells in the SA node. It differs from the ventricular action potential in that the depolarization occurs "automatically" almost at normal intervals. This action potential is divided into 3 phases.
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Easy to understand and straight to the point. Keep up the good work!
Short and sweet! Thank you for this beautiful and brief explanation!
short crisp and precise ✊🏼💙💚❤️💜
Short,crisp & precise ..thanks man 👍
God bless you! Such a brilliant video on this! I am a medical student at KCL and this is honestly incredible! 😀
Thank you so much!!
Hypokalaemia EKG changes video please!!!!!! Loved the hyperkalaemia one
Very informative, short and concise. Thx 👍
Thank you so much sir 🙏
Thank you
Thanks alot
Spot on
Awesome
Thank youu
Nice 👍👍
Wah i was reading it today 😅
great
Most precise
Is ventricular action potential and action potential of a myocyte the same thing?
Cool
good
What is pacemaker potential 1:11
But I had a doubt there is any pump to restore there intial stage ??for to pull k+ions inside push the ca ion outside??????
There actually is a Na+/Ca2+ exchanger and is controlled by the electrical gradient. Also there is a Voltage sensitive delayed-rectifying K+ channel that stabilizes resting membrane potential, controlled via parasym. stimulation.
Why we say hyper depolarizaton while it doesn't go under -60
how is the movement of potassium out of the cell making the inside of the cell more negative?
The movement of potassium out of the cell causes it to lose positive charge making it less positive
How does the calcium get back out and the potassium get back in? Where and when does this happen?
I had the same question, wanted to know how the cycle gets closed.
propably by active transport, like the Na/Ca transporter, Ca pump and na/k pump@@modrribaz1691
❤❤
These captions/transcription is not doing it for me. Which I wish it was translated, instead I read about "Avengers" and "hyundai"????
I thought phase 0 is when sodium rushes into the cells causing depolarization
Yeh but in case of other cardic cells like ventricular or atrial myocardium
why we need hyperpolarization?
Actually he should say it is repolarization since it only goes back to -60(or -65)
To answer your question,
when the potential reach +5 the Sodium channel is close and Potassium channel is opened(out flow) so it becomes negative again and once it reaches resting membrane potentioan(RMP), the reaction can be started again.
There is no hyper polarization in cardiac muscle because cardiac muscle works from the start of your birth until your death and it beats 70 time in minute so its essential to prevent any time gab so there is no hyper polarization but it present in other types of tissues like in neurons
The reason of hyperpolarization in neurons is to prevent epilepsy as the time gab of hyper polarization will prevent the fast repeated action potential so will prevent epilepsy
This is Allah's wisdom and glory
Indeed, all things We created with predestination. Surah Al-Qamar: Verse 49
The captions tho ...
How is the potassium concentration in cell maintained?
Na/K Pump