Effect of Parasympathetic and Sympathetic Activation on SA Node || Autonomic Control of Heart Rate

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Video Summary:
Acetylcholine released from parasympathetic nerve endings makes cells of the SA node less excitable and thereby decreases heart rate. Whereas noradrenaline released from sympathetic nerve endings makes the cells of the SA node more excitable and thereby increases heart rate.
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Chapters
00:00 Intro
00:45 Action Potential in SA Node
02:20 Parasympathetic Effect
06:03 Sympathetic Effect
07:51 Summary
Dr. Vipul Navadiya
DISCLAIMER: This video is for education purposes only. Although every effort is made to ensure the accuracy of the material, viewers should refer to the appropriate regulatory body/authorized websites, guidelines, and other suitable sources of information as deemed relevant and applicable. In view of the possibility of human error or changes in medical science, any person or organization involved in the preparation of this work accepts no responsibility for any errors or omissions, or results obtained from the use of information in this video.

Пікірлер: 35

@SaraMicallef Жыл бұрын

Cant explain how great this was. Thanks, much love

@farhanasakkaf7947 2 жыл бұрын

TAHNK YOU FOR THIS CONTENT,FOUND IT MORE USEFUL .

@NonstopNeuron 2 жыл бұрын

Most welcome. Please share to support us. Thank you

@hamidulloahmadjonov9647 Жыл бұрын

Wooow Thank you for this video This video was very useful for me

@kendall2004 9 ай бұрын

thank you great as always

@AK-lj3fm Ай бұрын

great expanation

@freezinganimenz7835 Жыл бұрын

Thank you so much sir!!!

@dewakhandewakhan2170 Жыл бұрын

Really amazing

@Bethel1313 Ай бұрын

You are best

@TeKANNAKeT 2 жыл бұрын

Nice content. Helps a lot. Thanks!

@NonstopNeuron 2 жыл бұрын

Glad to hear it!

@hinaarshad5296 Жыл бұрын

This us such a useful video

@kabr93 10 ай бұрын

Thank you!! Now it makes senses

@NonstopNeuron 10 ай бұрын

You're welcome!

@user-vc1vu9es6f 9 ай бұрын

شرح راقي⭐

@suhanashaikh371 Жыл бұрын

Thankyou sir ☺️

@montazaraldujeili2475 2 жыл бұрын

Grazie mille

@ThelxoxlGirls Жыл бұрын

How does Calcium change the threshold potential?

@nknakavil3884 2 жыл бұрын

Super sir

@meet999 Жыл бұрын

How is Calcium entry related with increase or decrease in threshold?

@luisvargas3075 Жыл бұрын

Calcium channels are closed so there is no intracellular flux along with sodium , so if only sodium is being pumped in without the assistance of calcium while potassium is out it will take longer for the cell to reach threshold before the rapid depolarization. Hopefully that helps.

@ihopeverythingisgonnabealr649 Жыл бұрын

thank you sir! but i wanna ask why does Na not contribute to decreasing threshold in sympathetic activation??

@edyt5779 Жыл бұрын

وحش انت 😂😂

@nouraltamamy3632 2 жыл бұрын

This is very very great ♥️♥️♥️ But I want to know how parasympathetic predominates sympathetic during rest?!

@NonstopNeuron 2 жыл бұрын

Its just how they are tuned. We don't need extra activity of heart during rest. So sympathetic system is not so active.

@luisvargas3075 Жыл бұрын

Sympathetic = fight or flight response. Parasympathetic = rest and digest. During times of relaxation our body will utilize acetylcholine as a transmitter to reduce heart rate. When we are startled or scared our body also naturally produces norepinephrine and epinephrine to get our heart rate up. We will only use one or the other (sympathetic or parasympathetic) and not both at the same time.

@Savannahh023 Жыл бұрын

🙏🏻 many thanks

@Savannahh023 Жыл бұрын

🔥🔥

@johncouldridge7941 7 ай бұрын

Reading this trying to find an answer why I keep getting ectopic beats. What causes them? Sympathetic or parasympathetic? Anything I can do besides meditation and no caffeine, alcohol to stop them? I have tried so much and suffered for 5 years 😢 thanks 🙏

@josetrujillo738 2 ай бұрын

I’ve heard that a very large quantity of the population is deficient in Magnesium: which is important for proper muscle function, including the heart. I’ve also heard that Niacin(Vit. B3) is very beneficial for the cardiovascular system: but it needs to be the niacin that causes a “flush”; which can be to strong and uncomfortable for some people: their is a “slow release” variety of Niacin as a supplement, which I believe minimizes the potential “flush”. The “flush” is more less a “tingling” sensation on your body.