MEMBRANE POTENTIAL & THE ROLE OF POTASSIUM; PART 2 by Professor Fink

Review of the Generation & Conduction of Action Potentials. This Lecture reviews the opening & closing of Ion Channels, the Relationship between Stimulus Intensity & Response, the Relationship between the Electrical Refractory Period & Frequency of Action Potentials, and the Factors affecting Conduction Velocity (Diameter of Fiber & Myelination). Reference is made to concentration gradients, electrical gradients, ligand-gated Na Channels, voltage-gated K Channels, voltage-gated Na Channels, electrical polarity, depolarization, repolarization, hyperpolarization, Na/K-ATP Pumps, Subthreshold Stimulus, Local Response, Threshold Potential, Suprathreshold Stimulus, myelinating cells (oligodendroglia & Schwann cells), Nodes of Ranvier, Saltatory Conduction, Multiple Sclerosis and fibrosis.
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....
“Hard Copy” Lecture Outlines can be purchased from the WLAC Bookstore at: onlinestore.wla...

[@nilminisubramaniam7985]

You are the only person who can explain with this much passion. Great job! learned a lot, especially learned how to teach this chapter: thank you!!!!!!

[@TheSocialSmilingMonkey]

Very clear & concise.
Thank you Prof Fink😁

[@bipink.shrestha2821]

Nice lecture professor Fink! Sir,Kind of confused with the effects of Hyperkalemia you explained. I Had the understanding that moderate hyperkalemia causes decrease in HR and Contractility( by Increasing potassium conductance in pacemaker cells and myocardial cells) and with increasing hyperkalemia heart stops in Diastole. Also potassium is used as an anti-arryhthmics(Prolongs Action potential duration,slows conduction).I would be so grateful if you explained.Thank you sir!!

[@abdik9002]

Great professor! Thank you.

[@hebo506]

Thanks a lot ❤❤
But Kalium is arabic word meaning alkale or something alkaline
Accept my respect ❤

[@dylanperalez3939]

I like the way you give detailed explanations of what’s really going on with the electrical changes and the diffusion difference, I wish you could teach like this with all the other electrolytes

[@gilliasatenay3489]

Professor Fink you are such an amazing professor. You really simplify those complicated systems and structures. You are my go to professor. Thank you, thank you ❤️

[@curiousbit9228]

Damn! theses biology major students sit and listen to their lectures like stories. It's not the same in Physics classes. Often we don't understand what is happening.

[@edingerwestphal1287]

Master of clarification

[@eqisoftcom]

In fact, in chronic hyperkalemia inactivation gates of sodium channels do not open as readily as before, action potentials cannot be generated, and paralysis occurs.

[@medicallifewithjohn]

Awesome

[@elyisus8145]

Thank you (Y) existential question solved!

[@hy0328]

Thanks a lot for posting good lectures. It helps a lot.

[@yvonnehouse5537]

I can not thank you enough. I totally get it now. You dont follow my class exactly but close enough I can get main concepts. You will be the reason I pass

[@hiefia8568]

i love the voices and sounds you make

[@bless1012]

Oh, I ❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤ ❤❤❤❤ him

[@TheHyperMD]

THANK YOU!!!