MEMBRANE POTENTIAL & THE ROLE OF POTASSIUM; PART 1 by Professor Fink

Рет қаралды 69,391

12 жыл бұрын

Review of the Cell Membrane Potential & the Role of Potassium; Part 1. This Lecture reviews basic electrical concepts (Voltage, Current, electrical Resistance & Ohms Law), the normal concentrations of Potassium ions and Sodium ions inside & outside the cell, concentration gradients, electrical gradients, the Equilibrium Potential, the Nernst Equation, and the Na/K-ATP Pumps.
Check-out professor fink's web-site or additional resources in Biology, Anatomy, Physiology & Pharmacology: www.professorfink.com
Down-loadable e-Books of the Lecture Outlines by Professor Fink can be purchased from the WLAC Bookstore at: wlac.redshelf.com/
“Hard Copy” Lecture Outlines can be purchased from the WLAC Bookstore at: onlinestore.wlac.edu/fink.asp

Пікірлер: 64

@JustPiichi 10 жыл бұрын

Learning really isn't a chore with professors like you. Thank you once again for being my online guide through Anatomy and now Physiology.

@doubledancer 9 жыл бұрын

These lectures are BRILLIANT!!!!!!!!! I am having "eureka!" moments over and over again! SO many thanks, Professor Fink!!!

@stephaniebernal5100 3 жыл бұрын

🤯All the lightbulbs went off! Thank you, Professor Fink!

@mariacurie8102 8 жыл бұрын

I listened to this guy when I was a junior in high school studying for AP Bio, and I'm still listening to him now as a 4th year Bio major. I bet I'll be watching these when I'll be in dental school too. Brilliant instructor!

@Toastwig 2 жыл бұрын

you make these subjects come alive, thank you sir!

@tyronebigsby2169 Жыл бұрын

Fiiiiiiiiiiinally makes sense thank you!

@edengebeyaw6545 10 жыл бұрын

Professor you are making a difference in students life..for sure my " A" in this course is because of you .. i don't know how to thank you enough ..

@fenny121289 12 жыл бұрын

I'm studying in Taiwan and my physiology teacher uses english pictures and explains in chinese, and it was so difficult for me to get it. THANK YOU SO MUCH> I'm starting to find it interesting.

@bessieeva 9 жыл бұрын

lecture way better than my physiology teacher! so helpful

@foreverwood1963 11 жыл бұрын

you instruct very well. The art of teaching is ALIVE!

@wafikiri_ 9 жыл бұрын

Having previously watched another, I just Liked this lecture before starting. I am sure it will be at least of the same quality.

@salim1685 11 жыл бұрын

Great videos!! Just few people "professors" on earth share their knowledge. Thank you professor Fink. You deserve what I call the KZfaq Teaching Award.

@UniqueMichelle25 6 жыл бұрын

Who's still watching Proffessor fink in 2017? 🤚🏾🤚🏾

@cranerain8787 6 жыл бұрын

i wish all my professors were like this

@quencellahandford5485 6 жыл бұрын

Eline l. 2018 😂

@melissakimmel6629 6 жыл бұрын

I am.! He's wordy and low tech, but I get what I need from his lectures!

@jen598 6 жыл бұрын

2018

@hussinalyasiry370 5 жыл бұрын

2019

@pinkbull2110 9 жыл бұрын

Sir, thank you, please update every single video, I always watch them every week.

@LaLa-pg2yj 9 жыл бұрын

Wish I were your student my physiology class is so boring where I learn nothing, you're great professor God bless you

@lindaandersson1206 12 жыл бұрын

Thank you so much for all your videos! You are truly the ideal teacher! Thanks for existing!

@kuhataparunks 6 жыл бұрын

thanks for posting these I must review this for nursing classes and this is astoundingly remarkably clear, great job thanks again

@Biomika 5 жыл бұрын

I am grateful I have found your videos professor. Thank you! 🙂🌸🌷

@johntindell9591 Жыл бұрын

Best explanation.

@tarahstefans2258 6 жыл бұрын

you are probably one of the best professor's in the world

@howardngo6459 7 жыл бұрын

Great teacher. Explain things so clearly to understand and memorize. Thanks.

@olderphysician 11 жыл бұрын

Thank you so much Sir! You were born to teach!

@shefeekps 9 жыл бұрын

A dedicated teacher & blessed students

@rlafhaks 12 жыл бұрын

Thank You Professor Fink for uploading your great lectures for everyone.

@AliAli-km4xs 9 жыл бұрын

thanks you sir u thise your time and energy for high price lectures u teach every body around world . thanks again professor fink.

@vivekkothari92 12 жыл бұрын

You're an awesome teacher! Great clarity and enthusiasm :)

@OlechkaPar 11 жыл бұрын

Great explanation! Thank you!

@Lauren-gp7dz 9 жыл бұрын

this guy... the real mvp

@rafishamoo5325 7 жыл бұрын

your the real map ;)

@rafishamoo5325 7 жыл бұрын

mvp lol damn auto correct

@25sweetspicy 9 жыл бұрын

luv luv luv your videos!!!

@siyavishpatel 12 жыл бұрын

Great explanation sir, never seen this type of video. I will keep watching.

@purplefurple 12 жыл бұрын

thank you for this!

@lalaichyblessed3560 4 жыл бұрын

Very interesting, well explained Professor

@rwharrington87 5 жыл бұрын

Insanely clear explanation. Not sure why most material on elementary electricity seem so convoluted compared to this.

@swernymumba2834 4 жыл бұрын

Great professor

@ibibotaribagshaw2815 5 жыл бұрын

Wow!!! How did you get the method or idea of teaching like this? This is pure art! I understood every bit of it

@Todaywithnancy 5 жыл бұрын

Ibibo Tari Bagshaw I’m here too🥰👏😁

@sakama40 8 жыл бұрын

damn, you are really good teacher

@sari-7458 7 жыл бұрын

professor , from where i can have those notes that you are teaching from ?

@professorfink 7 жыл бұрын

e-Books of the Lecture Outlines by Professor Fink can be purchased from the WLAC Bookstore at: wlac.redshelf.com/ . [e-Books provide 100% off-line reading and 20% printing]“Hard Copy” Lecture Outlines can be purchased from the WLAC Bookstore at: onlinestore.wlac.edu/fink.asp Also, additional resources available at my web-site: www.professorfink.com

@HafizahHoshni 11 жыл бұрын

Thanks ! XD

@jorgeescalante4176 12 жыл бұрын

48:31 I think it is the concentration in the 'outside' of the cell divided by the concentration in the 'inside' of the cell

@rmariboe 8 жыл бұрын

Nice. That Nernst in the end doesn't seem right though; using z = 1 renders 88,6 V(!). A value of z = 102,5 and ln(5/150) moves us into ballpark territory at -0.0887 V. Is this because of negatively charged amino acids inside the cell?

@aza4444 8 жыл бұрын

0.0887V is 88mV. I assume he used 0.15V and 0.05V in the equation. Fink also explains that the only cause of cell polarisation is the fact the potassium is able to diffuse, but I'm not super clear on that.

@doasido5757 5 жыл бұрын

Some sodium enters the cell

@mjnona 2 жыл бұрын

My question is what is the important of the voltage and these ion in the cells to the cells or to me why this voltage is important to the cell

@professorfink 2 жыл бұрын

Changes in the voltage of nerve cells is how they transmit electrical signals (action potentials) in the nervous system. The electrical voltage changes in muscle cells is the basis for how muscles contract & relax.

@ashnaali4029 6 жыл бұрын

why does lower blood calcium level cause nervous hyperexcitation ???

@professorfink 6 жыл бұрын

extracellular Ca+2 normally acts to block voltage-gated Na+ Channels. Therefore, reduced extracellular Ca+2 (hypocalcemia) leads to increased entry of Na+ into excitable cells causing increased generation of action potentials & "tetany".

@ashnaali4029 6 жыл бұрын

professorfink thank you 🙂

@jorgeescalante4176 12 жыл бұрын

47:51 actually R means universal gas constant (R = 8.314 472(15) J K−1 mol−1)