Nervous system 4, Nerve impulses

[@Abhaywr]

An animation can never replace the place of an old professor, there is always something about them!!!!!

[@EmancipatedEssence]

A big thank you to Dr John Campbell for sharing his knowledge with us. I really enjoy your lectures and you make things look easy. You are a Genius.

[@NkrumahEvelynKonadu]

Dr. John Campbell, thank you for your teaching techniques, you add diagrams and give simple explanation

[@joshuamakori3612]

I really can't believe how I struggle to go through the words in books ...but Dr Campbell you've simplified everything and I haven't even struggled to understand..thank you so much...

[@afjo9435]

Sir you are so great!!!! .I literally have zero knowledge of this but I have got everything you said. HAVE A GREAT RESPECT FOR YOU SIR

[@sachinchikku89]

Dr. Campbell I used to watch your all videos. And the way you teach us us really simple and understandable!! I suggest you to add some lectures about disease too ..

[@bhanteny3863]

Thank you Dr.John for the big knowledge that you have shared. May God bless!!!!

[@WarMoose20]

Thanks for this video, John. I discovered your channel through the pandemic videos, but these old teaching videos have been a treasure trove which have helped me get through my Access Course - many thanks!

[@mikhailoye]

My professor could take a few lessons from you. I really appreciate your teaching methods.

[@niketabhatt6994]

Thank you very much Dr.John Campbell .Really enjoying video and how you make easy for someone.Big Thank you to you.

[@fodaybangura2985]

I want to say you are the best lecture ever on U tube thank you for unpacking knowledge on us

[@cynthiakanda3503]

You are a great blessing!may God bless you Much love from Kenya 💕

[@MamaZShaman]

Kind, considerate, thorough and respectful - thank you Dr. John

[@cannizaro4927]

He is living legend love to watch ur miracle lectures ❤❤🎉🎉

[@adeosunabayomi346]

Wow! I'm not a fan of watching videos for understanding, but after trying to understand the transmission through axon and it was futile, I came online. My instinct just clicked on Dr. John's channel. Goodness! I enjoyed this and I'm coming for more. I already did subscribed 😂❤

[@ginawillson2242]

I found this the hardest concept to understand so far! but grateful as always for your videos

[@bernicedejongh5315]

Wow! You're good at explaining and simplifying knowledge,thank you for sharing this.....I was struggling with understanding this concept but now am good 🥰.... you're a great teacher Dr Campbell 👏👏❤️

[@amirzendehdel8876]

Thank you Dr Campbel , you made me better view to nerve's signal transmitting. :)

[@hosearowe8345]

Thank you prof I never before understood this so well Reminds me of studying in England and the detailed attention to content 😌

[@zatunjamsa]

Thank you for explaining action potential!😊

[@praveshkumar98]

thanks for well explained on nerve impulses again thanks for clear the topic how to travel nerve impulses on human body

[@janetmurdoch1393]

I actually learnt soooo much!!!! You explained it so well, i understood EVERYTHING please keep adding videos. Thank you !!!!!

[@japreet_kah]

John you're a master of teaching!

[@Zay-cp5qe]

great explanation .Thank you

[@shashimoghe3920]

Thanks dr john Campbell sir for imparting this vital and important knowledge 15/07/2022

[@sanjeevi1146]

Thank you so much sir ......its very useful and you are teaching slow so that we can understand .............appreciate it

[@ivanibob5747]

Best video on nerve impulses I've ever seen !!! Thank you soooooooo much:)

[@meditationwithaghyad6424]

You are the BEST ! Thank you Doctor !

[@mariaedward1099]

Thank you for this perfect explanation and the perfect effort , this video really helps me ❤️

[@ynageswarrao1590]

Damn you're too good at explaining difficult topics w-out any mishap. Juss loved it...! ❤️✨

[@Amfkndinosaur]

BEST EXPLANATION.

[@sulaimanbata6793]

Thanks Doctor

[@choudharyali8130]

SIR U R A GREAT TEACHER .

[@gibsonmwaura3939]

Thanks you, your video are very educative

[@masroolahmad1312]

Amazing way to describe it

[@jeankia1]

THANK GODDESS FOR YOU TUBE ,excellent job 👍🏽

[@mohamedamshaher9161]

Thank you DOCTOR

[@justinaibe5080]

Thanks professor.

[@daniellewalker1137]

Thanks for finally making this information and terminology stick. Its taken some doing...

[@navneetbharti9356]

Nice

[@navneetbharti9356]

India

[@chewcharlie32]

Fantastic explanation thanks so much 😉

[@abdirazakmo1553]

thanks doctor

[@obama2523]

Campbell u should live forever

[@shahzadsaleem5955]

Sir.its great.

[@muratgorgin6044]

Thank you so much sir

[@magicturtle_6936]

Fantastic video!

[@massagetherapyforinjuriesf8197]

Doctor John Campbell is helping me better than any others teachers in Colleges and Medical Universities…we all love John…

[@daphjam567]

HOW ARE YOU SO GOOD!!!!!!!!!!

[@muhammadyaseenmahtaab7820]

Thank you...

[@minoshkabatista]

Great video. Thanks.

[@reginangosa2740]

Thanks so much

[@SaadKhan-pu7xf]

Outstanding thanks sir

[@xuanhangduong6825]

Thank you!

[@maialbana9904]

So amazing

So for example cold and heat sensors have different frequencies and when they combine they result in frequency of pain?

[@Minaz_5]

Thank youuu Dr you helped me a lot 🤍

[@Biologywithrasheed]

Outclassed

[@SairaSabir1443AH]

@11:00 who made Frequency coding of Adam and human beings at such a specialized coded system

[@hannahharrison8461]

Thankyou so much

[@ottoraabbscee4739]

Dr. Campbell, thank you for your lectures here. Question: what is the difference between a pressure transducer in the skin & a touch transducer in the skin, transducer of course being an entity changing a physical phenomena to an electrical or chemical signal. Thank you for your input/thoughts. ~Otto Raab

[@Campbellteaching]

+Otto Raab, BScEE Both of these transduct a tactile stimulus into electrical neuronal impulses. However, they are two completely different types of peripheral receptors, different in form and function. Touch receptors are near the surface of the dermis, and lower epidermis, while pressure receptors are deeper in the dermis.

[@ottoraabbscee4739]

Thank you for that explanation Dr. Campbell. Now I understand the difference! I enjoy the lectures.

[@gregorymcnally9257]

I thought a Mv was a 1000th of a volt, so when the voltage changes to +30Mv its not a net change of a tenth of a volt from -70Mv. ??

[@as_positive_as_proton]

Genius

[@fatemevasseghi1103]

❤❤❤

[@yumnaammar7604]

Please, what is the meaning of polarization?

[@notanuragg]

Separation of charges basically

[@shekhar9856]

When action potential in nueron is at rest position

[@paulcrooks4467]

Electrical conduction

[@QueenSipp]

Spatical zone shift.

[@sumitdhanda6559]

Thank you Sir I have a few questions 1.Reason for negative charge inside and 2.how the negative charge gone outside ??? Plzz rply

[@pawandissanayake1654]

When there is no nerve impulse passing by..inside the nerve is negatively charged due to chloride ions and few negatively charged proteins , and even positively charged potassium ions are inside the nerve cell, so inside the never cell is said to be negatively charged compared to the outside .when an action potential start to occurs (above -55mV), "voltage gated sodium channels" which are embedded in the nerve cell membrane open so more Sodium ions rushes in.making inside negative and outside positive .

[@rayamoooooo685]

☺ thx

[@SA83ksa]

Take other class for over experience. What happens to Social media

[@godhelpme8977]

Not bad

[@muhammadfawad1813]

hello sir i want to contact you

[@vaibhavkumar8541]

make more videos

[@vaibhavkumar8541]

super video really helped

[@tanishqchaurasia5079]

Sir I had a question that do these impulses travel in a particular direction only and if yes then why??

[@pawandissanayake1654]

Tanishq Chaurasia . 1.these nerve impulses are said to be unidirectional (-impulses travel only in one particular direction) because after the action potential, when the nerve cell is repolarizing , before going back to the polarised state at -70mV ,the voltage will drop down to -85mV (hyperpolarisation) and then only return back to the polarised state(-70mV).this period is known as the" refractory period " and No nerve impulse can pass during this period so impulses won't travel backwards . 2 . Synaptic vesicles which contains neurotransmitters are always inside the synaptic bulb in the presynaptic neuron. And sodium ion channels with receptors( receptors that bind with the neurotransmitters)are always located on the post synaptic membrane. This also make action potentials go in one direction.

[@lambodotto93]

Enjoyable

[@dalejx7090]

11:50 like a baws

[@ifeomammachukwu9727]

Sir,the cell walls is made up of phospholipids.can water from extracellular fluid enter the cell? How can the different ions exchanged between the intracellular and extracellular fluid.?

[@Campbellteaching]

Yes, ions go in and out through specialised protein based channels Calle ionophores

[@getmoremakonza7085]

Thank you sir