Part 7a - Graded and Action Potentials

*Sorry for the audio quality on this video.

This is Part 7a of a new series on the human nervous system. The Part 7a video will introduce graded and action potentials; in part 7b we will talk about refractory periods and action potential propagation.

See my channel for more tutorials on physiology and related subjects.

Category:

Education

Tags:

• action potential
• graded potential
• depolarization
• over shoot
• repolarization
• hyperpolarization
• relative membrane permeability
• physiology
• nervous system
• tutorial
• tutor
• tutortom
• tutortom10

[TheMarshin7]

i like your videos bro!, but not trying to step on your toes but make sure you emphasize depolarization when it hit -60 mvs a little more. because when the graded potential hits --60 mvs it hits its threshold and and causes it to sky rocket up towards +30 mv. this is when action potential occurs and opens the [K+] gates to open in hyper polarization. Otherwise badass video and all your other videos have helped me!!!! (:

[TutorTom10]

@TheMarshin7 Thanks for your feedback! Re graded potentials causing APs, I talk about this in Part 7b. I have emphasized the threshold concept in this video (see @6:30), though stated it as -55mV (it can vary, but it's generally between -55mV and -40mV; -60mV is getting too close to resting membrane potential). I also talk about the K+ relative membrane permeability (including voltage-gated ion channels) in this video (see @9:20).

Hope this helps :)

[tumbler0615]

You've probably effected so many grades...in.a good way of course :)

[TutorTom10]

Well that would be a nice thought!! I certainly hope so, thanks!

[tumbler0615]

Thank you so much.

[TutorTom10]

@tumbler0615 You're very welcome! Thank you for your time :)

[dexylover]

wonky!

[5CapriCe5]

Thank you Thank you Thank you Thankyou

[jennguyenkute]

im currently taking physiology for my nursing and i found ur video which is really helpfull. thankyou very much

[HBoyzFan]

@TutorTom10 I thought it was -55mv for threshold

[TheMarshin7]

@TheMarshin7 *When its around the area of -60 mvs

[TutorTom10]

@MedveX Thanks and you are very welcome! Good luck in your study :)