012 The Absolute and Relative Refractory Periods
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- Опубліковано 7 чер 2024
- www.interactive-biology.com - When can an axon be restimulated to produce an action potential? After the Absolute Refractory Period has finished. It's possible to cause another action potential during the relative refractory period, but it takes a stronger stimulus. Watch this Video for more info
That was so well illustrated and explained. This is the exact explanation I needed, thank you!
This helped me a lot I was so confusef. Now every thing makes sense
Thank you
Thank you so much! I just couldn't wrap my brain around it until I saw this video!
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Awesome video. I'm a new paramedic and this really a great refresher. Thank you, I'm def subscribing
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ive read guyton a couple of times, for hours on end and it finally made sense watching this video, God Bless thanks......... : )
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Clear explanation of what I was confused about! Thank you so much! :D
During repolarization Na+ channels close and K+ open causing an efflux of K+ and an overshoot of below -70mV. Sodium potassium pump and leak channels are working in the background to re-establish resting potential.
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10 years later, still an awesome video!
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you are great. thanks for putting it in a way that i could get the concepts finally.
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This helped me a lot, thank you!
Thanks alot sir, you've explained it quite simply :)
Thank you so much! I wouldnt change anything in this vid! Keep up the great work!
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You make me confident to get an A for my class! I really appreciate it:]
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Thank you!!!! I understood what the periods were but needed a visual aid!!. Thank u!!
Thank you, Thank you, Thank you. So easily explained. Life saver.
Awesome video. Thanks so much for doing this. It would have taken me hours of reading from a textbook to reach this level of understanding. Thank you, thank you, thank you.
Thank YOU, Leslie! God Bless YOU!
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Thank you sir! This was very helpful, in my opinion! Bless you and thank you sir! :)
the day just smiled at me :D this is the best channel
i hav my physiology exam in 2 days n i couldnt understand certain things before finding this channel but as i said grrrrrr8 channel ;D
Thank you so much,I now understand.Keep up the good work!
Thank you, this was so clear and easy to understand!
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@UniGirl9008 Unfortunately, Leslie has a lot of things to do at the moment, getting busy with the site, his work, and personal life. He's not had the time lately to check posts and get back to them. Please do stay tuned though as he'll be uploading more videos soon that may clarify your question. Thank you!
Thank you so much! I am taking this in class and you were incredibly helpful!
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Thank you so much for helping us crush many difficulties
Hello, and THANK YOU for your videos!!! They truly simplify information. Would you happen to have videos on ALL of the characteristics of Action Potential (including "nondecremental" & "irreversible")?
This TOTALLY made sense!
Thank you
You're welcome
5:42 its wrong. Na channels are not closed, but inactivated. You can not use them again until Membrane potential reaches resting potential.
@warpedoctave Glad to know the videos are helping. Stay tuned for MANY more to come :)
MAN THANK YOU!
That was so easy and you explained it better than my teacher!
ThankYou!
Thank you so much ! That was very helpful.
@Djalitana No prob. Glad you found it.
Thanks for the video. It really helped alot in understanding the process
This video helped me a lot. Thank you very much.
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hey ive got a question...u say the sodium voltage gated sodium channels r either open or inactive...so what do u mean exactly by inactive n wts making it inactive??
@crackowacko87 No, the relative refractory period is longer. It starts at the peak of the action potential and continues until the resting membrane potential is restored. Hope that helps!
Great video! Thanks so much!! You made it really easy to understand!
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I finally understand this, thanks a lot.
Thanks for explaining it so well.
A refractory period simply refers to the time frame in which the generation of further action potentials may be hindered (RRP) or may not occur at all (ARP). Hyperpolarization, in contrast, describes an event where the cell's membrane potential drops to levels below its resting potential due to excess K+ leaving the cell. However, it would be correct to say that hyperpolarization could occur during the RELATIVE refractory period (RRP). Hope that helps!
Thank you so much. It's better than my books' explaination.
hi i love thevideos but i have a couple of questions umm firstly what causes the ion gates to open or close or be inactive? and why do the Na+ and K+ gates open at different times?
thank you
Interactive Biology Hey Leslie. Got a quick question.
So as the neuron is repolarizing,
a Relative RP is possible as long as as the repolarization period is between threshold (-55mv) and the resting potential (-70mv), including hyperpolarization (undershoot)?
Superb explanation!
Thanks. Glad to help 👍🏽
Oh I found it. please disregard my request about making a vid about refractory period. now I understand, the sodium chanel doesn't close like bang. it closes gradually right? and this causes that the second stimulus needs to be stronger than the first one to produce an action potential?! thanks for this clip
I was watching numerous videos from other sources and it was explained that the relative refractory period is from -70 to -70 during the refractory period. during the initial refractory (peak), sodium gated channels are locked and unable to open until -70, then they could restart an action potential with greater stimulus at or after -70 since the potassium is still open and does not close until -90/ hyper repolarization
can you explain a little further as to why the refractory period starts at the initial decent?
thank you
Wow, thank you so much for making this easier! I'm really struggling with psychology. Keep making videos!
You are very much welcome, Carl.
Me too
guys quick question. after a stimulus when sodium ions rush into the cell and potassium rushes out are these molecules actively transported back to where they were in first place or what?
Hi Leslie, how about Functional Refractory Period?
I totally Understood the concept xD Thank u sooooo muchhhhhhhh :D
best video so far
Very clear! Thank you so much!
thank you so much ... i study in french but because i didn't understand i try your video and it was so helpful .. thank you
Omg thank you i was struggling to get the idea of it
Hi, thanks for the video!! I have a question: What happen to K+ channels at resting potential phase and during depolarisation? do they close during depolarisation but stay open at resting potential?
Which K+ channels are you referring to? V-gated or passive/leaky? If you're talking about V-gated, they are closed during those two phases. If you're referring to passive/leaky, they are always open, but during the action potential, their effect is negligible.
thank you sir for this video
Absolutely helpful
A black guy teaching Bio I love this brotha! Good video, island vibes lol.
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Hey I heard ur interview on the Smart Passive Income podcast!! Now I'm studying for my neurophysiology midterm and I coincidentally stumbled to your videos haha. Th
thanks a lot... it makes my review so easy to understand... God bless
Thank you so much Mr. Samuel
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the stimulus that doesn't reach the thereshold is it the graded potential place ?
I am very happy to see this video love from 🇮🇳India (my lovely country)
perfectly explained, thank youuu
Very helpful , really appreciate it
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thank u for help me to understanding what the different between ARP and RRP
I am not able to understand the tranfer of action potential across axon?? How myelinated nerve fibers are fast conductors and non myelinated are slow conductors.
Thanks a lot! Very helpful!
By "resetting" you mean that the sodium voltage gated ion channels are no longer inactive, but are now deactivated, correct?
sir , why do after depolarization the threshold stimulus decrease and the cell is excitable ? and why during after hyperpolarization the threshold stimulus increase and the cell is less excitable ?
this was so helpful thank you
@ediniz101 Those questions are answered in Episodes 9 - 11 and 14. Check out those videos. They should help!
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Amazing, thank you!
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Very good job explaining!!
Why thank you
Thanks a lot very helpful after a few days i have my 1st prof mbbs exam
Well explained. Thank you.
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Thanks for this good explanation!
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Thank you for the video. This helps a lot :))
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