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

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.

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!

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 ..

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

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

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 😂❤

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...

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

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

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

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

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

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

Thank you for explaining action potential!😊

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

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

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

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

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

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

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

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

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 👏👏❤️

great explanation .Thank you

John you're a master of teaching!

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

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

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

You are the BEST ! Thank you Doctor !

BEST EXPLANATION.

SIR U R A GREAT TEACHER .

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

THANK GODDESS FOR YOU TUBE ,excellent job 👍🏽

Thanks Doctor

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

@navneetbharti9356

3 жыл бұрын

Nice

@navneetbharti9356

3 жыл бұрын

India

Thanks professor.

Thanks you, your video are very educative

Thank you DOCTOR

Campbell u should live forever

Sir.its great.

Thank you!

Fantastic video!

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

Amazing way to describe it

Fantastic explanation thanks so much 😉

Great video. Thanks.

Thank you...

Thanks so much

Thank you so much sir

thanks doctor

So amazing

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

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

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

8 жыл бұрын

+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

8 жыл бұрын

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

Outclassed

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. ??

Outstanding thanks sir

Thank youuu Dr you helped me a lot 🤍

Please, what is the meaning of polarization?

@notanuragg

3 жыл бұрын

Separation of charges basically

@shekhar9856

3 жыл бұрын

When action potential in nueron is at rest position

Thankyou so much

Genius

Electrical conduction

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

5 жыл бұрын

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 .

❤❤❤

Spatical zone shift.

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

make more videos

@vaibhavkumar8541

6 жыл бұрын

super video really helped

☺ thx

hello sir i want to contact you

Not bad

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

@pawandissanayake1654

5 жыл бұрын

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.

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

4 жыл бұрын

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

@getmoremakonza7085

3 жыл бұрын

Thank you sir

11:50 like a baws

Enjoyable