The Sensory System

[@sixzzy9409]

Anybody watching Mr.Andersen video in 2022......his video and concept quality brings me here again..... From the bottom of my heart I'm sincerely thankful to Mr.Andersen.

[@sophiec3592]

12 years ago still here to learn! Thank you!

[@joshanijssen6734]

Dear mr Andersen, I have never thanked you for your great lessons. I have already passed my exams two years ago and now for my studies I needed to find some information on biological subjects. I immediately thought of you, nevertheless I have always recommended you to everyone in need for a great biological explanation. I sincerely would like to thank you for your great explanations, I would have never passed my exams without these great videos.

[@AggressiveBarbie]

Mr. Andersen: "You can't smell me." Me: *sheds a tear*

[@joeyh5325]

That's so hilarious because I heard " you can smell me" , lol !!!

[@keithdavies-evans4195]

Just wanted to say a big thank you for making a very complex subject really easy to understand in principle. Cheers

[@robertvalitsky5312]

He is a great teacher and fantastic teaching style. I am a Junior in college and use him and Khan Academy for all my science lessons, like A&P 2 right now a 300 level course.

[@briancheong2087]

just read a bunch of wikipedia pages its fun and easy

[@FinaChan]

I failed my humanbiology exam last semester because it was around 500 pages to study but these videos make it a lot easier for me this time! i'm actually motivated =)

[@bobherobrine3415]

lmao loser

[@999Princess]

That yell had me though 🤣

[@kimberlywinston8619]

Your a great day teacher I tell all my peers about your videos, they really help me with classes

[@mattfarwell7471]

your 100% better then my biology teacher in my school and with my final exam in biology tomorrow iv been watching quite a lot of your videos. thanks for helping me pass

[@faisal1029]

RIP headphone users. Thank you for the great video and for loosing one of my senses when my ears blew up

[@AyushArt]

2:23 Wow, Mr. Anderson is a great singer

[@yoyotenshi]

I WILL NEVER LOOK AWAY FROM THESE VIDEOS EVER AGAIN ;-;

[@yodaydyxz1752]

RIP for headphone wearers @ 2:33 😂

[@SilverlonewolfX]

+Yoda Ydyxz OMFG! That scared the crap out of me!

[@minminb9005]

Are you talking about when he screamed I think you are R.I.P Headphone wearers lol

[@whiteshadow59]

if only i read the comments first. rip me

[@Rwi-wk1pd]

😂😂😂

[@atheadax]

F in the chat boys

[@mikeraffaini]

Thank you for posting all of these, they are very helpful for reinforcing whats going on in class. Also, I'm always impressed with how smooth your writing with the mouse is... haha when I do that it looks like a a gripped a crayon with my foot.

[@ingriddiazsandbu479]

I love mr.Anderson! He is brilliant!

[@amhj3204]

2:33 I freaked out

[@happieholly71]

2:33 scared me so bad omg

[@aboudalmasri9011]

I scared too when his voice became high lol

[@caribaez5711]

you guys are so immature with this

[@kunalbhamare6321]

happieholly71 hi

[@minminb9005]

Don't be scared lol

[@paulmuldoon596]

Really?

[@artpage123]

Thank-you for such a pleasant explanation.

[@mcneemem]

Turn the volume up @2:30 because the noise is too quiet to hear at lower volumes

[@saipanidarapu6656]

bio diploma?

[@mcneemem]

audio technician prospector

[@felipeandresbustamante4013]

Muchas gracias. Saludos desde Chile.

[@kantiannambo]

Thank you for posting this -I am a Layman in this field and hope to have more understanding of this subject. I have had a septo-plasty surgery and am suffering heavy modulation & habituation of my coalition of neurons in my CNS.especially in my BASAL GANGLIA.

[@militantagnostic1968]

If you freeze the video at 1:05 so that the little 'A' is superimposed on the bigger A you can plainly see that the 2 A squares are of distinctly different shades. I have seen this demonstration on many different channels. Is this part of some vast conspiracy?

[@kriss4746]

You are seriously awesome! Your vids truly help me understand topics more in depth! Thanks!!!!

[@Tytus_Albas]

Thank you i forgot this stuff, now it's coming back.

[@peteranwer3067]

you are a perfect teacher!

[@clarayhki]

you are a lifesaver, hands down.

[@Doratius]

Thank you for making studying so much funnier and life so much easier!

[@kdjain]

Nicely explained! thanks Mr. Anderson.

[@idek_man007]

Thank you from England!!!

[@LogsgivesAnswers444]

You can hear me, you can see me, and you probably can't smell me. Score 1 for Hellen Keller. Thanks for your videos by the way, my grade has gone up 27% since I've seen them.

[@margaretwaithira9959]

excellent videos helped me understand the brain. thanks continue posting

[@tulam7819]

Many Thanks. You are an amazing teacher

[@renukakorvi5714]

i really luv all ur videos dey r sooo much help full to me to undrstnd all dese concepts soo clearly!

[@sweetmaggiesauce8158]

Thanks for all you do!

[@4UDIOTAPE]

Absolutely phenomenal. Thank you.

[@positivemind5163]

YOU MAKE LEARNING A LITTLE EASIER FOR ME TO LEARN

[@Interactivemedicine]

ohhhhhhhhhhh love you!!! please keep posting sensory system videos please!!!!

[@seyidcanyilmaz7402]

U scared the shit out of me at 2:32

[@hushgamer92]

Khan is the foundation of a building, Anderson is the Building blocks...so if ur foundation is strong, u can achieve a beautiful building.. I saw the nervous system videos in khan and now i understand action potential from anderson very effectively..so anderson and khan are my two eyes.... :D

[@Zifike]

I love you pal. Amazing and very very helpful video!

[@jazminromero-pz9kq]

mr Anderson is the GOAT

[@irtezamitha15]

I DIED AT 2:33

[@annmuiaa1509]

I learn visually so thanks so much for the help, keep it up, your videos are awesome !!

[@kimberlywinston8619]

Please continue to post

[@whiteshadow59]

Really like your style

[@kimberlywinston8619]

Again thank you so much

[@iowna439]

Thank u Mr..

[@user-dq4es5od2i]

where did you disappear mate missed you and your videos

[@EmilyImperfectly]

Mr. Anderson: saving my AP Bio grade, one video at a time c:

[@kimberlyboecker2758]

anybody watching in 2019

[@lynab9422]

2020 anyone ?

[@philipprebs6775]

@@lynab9422 here

[@alexisbrooks4267]

2020;)

[@ashutoshprasad8494]

nope,i am watching in 2020. XD

[@swapnasaha798]

2020*

[@kat-oh3hx]

some of the loudest things in the world, ranked 4. jet engine 3. thx logo 2. COMING SOON TO OWN ON DVD 1. 2:33

[@mitchellwilson951]

RIP my ears

[@thedruidicpath]

This video is so great!!! Even if your native language isn't english, you'll understand it perfect.

[@Lilly-qj9sf]

Thanks a lot!

[@oliverbrisland]

when you shouted you scared my cat she is now staring at the laptop like its possessed

[@8000Alexander]

D: why would you hurt me like this.

[@RedtalesUtube]

thanku, great info

[@AB00TA]

Thanks, Jacob!

[@dork15able]

is there a longer version of this?

[@PantherFaceJones]

If im not mistaken, RGC's are the only retinal cell who can communicate via action potential.

[@DeathscreamerS0S]

thanks a lot!

[@smartuy1]

Mr. Andersen is officially the Duke of Spook

[@SkwiotP]

Smartuy he may seem to be the cream of the team when it comes to memes

[@KaijuTuna]

+Eva Aitken well got test tomorrow so wont help me

[@smartuy1]

Tuna sallad study then stopid

[@KaijuTuna]

Smartuy *Stupid

[@arnoldalexisduranhernandez4809]

thank you

[@msfit23]

I love this guy....

[@slime-gz5kk]

Sent here from school 🏫🎒😊

[@damnnn3790]

god bless this man

[@bettielynncampbell]

are you going to make a motor system video pleeeeassee

[@NimaSajedi]

@Bozeman Science, I hope you check the comments. I understood than intensity of a sense is based on frequency of action potentials from your video. So, can we say that in sensory system and neurons, whenever action potential frequency is high, it means intensity of that sense is high (two way communication)? Also, as I'm learning from other videos, action potential is happening in axons, where messages are carried on, to prevent voltage loss in long paths; and longer the path, more action potential will be. So action potential is also a factor of length of axon. Then, how can we distinguish if number of action potential in an axon is related to intensity of a sense only (like a loud sound we hear) or it's due to long length of an axon?

[@dannichols6261]

@Nima: First, I am not an expert, just a life-long 'student', so please take my response with a grain of salt: 1. You said, "I understood than intensity of a sense is based on frequency of action potentials from your video." YES. I think you understand this correctly. 2. But then you asked, " can we say that in sensory system and neurons, whenever action potential frequency is high, it means intensity of that sense is high (two way communication)?". I would have again simply have said yes, and as far as I know, it is, but WHAT DO YOU MEAN BY 'two way communication' ? Your addition suggests likely misunderstanding. 3. Yes, action potential IS happening in axons (perhaps only mostly? I think 'back propagation' MAY sometimes happen in dendrites, not sure.) But in LONG axons, the action potential is not ALL that is happening with regard to the SIGNAL. In long axons the signal is a COMPOSITE called Saltatory Conduction, which is made up of alternating instances of action potential and graded potential. Graded potential for SPEED, and action potential for RE-AMPLIFICATION (to bring the WEAKENING graded potential back up to normal action potential amplitude). 4. But you seem to be misunderstanding axons with regard to myelination. Not all axons are melinated, some, wholly within the cortex layers and also inside brain nuclei can be very short and not be nor need myelination. 5. And when an axon IS myelinated, it does NOT make 'more action potential', it rather allows the signal which is only in part the action potential to be carried FASTER, so that where ever it's going it can get there in a useful time in relation to all other neural events. 6. So action potential (the SIZE of it) is NOT a factor of the length of the axon. Melination (and the alternating action potential at nodes of Ranvier BETWEEN the alternating sections of myelination, and the graded potential UNDER the alternating sections of myelination, yielding Saltatory Conduction), allows for the action potential to reach its destination in a 'speedy' manner, at its normal size & strength, despite some axons being very long, like those reaching or coming from your big toe. 7. So there IS no problem "distinguish(ing) if number of action potential in an axon is related to intensity of a sense only (like a loud sound we hear) or it's due to long length of an axon?", because the length of an axon does NOT 'increase' the intensity of the signal. The myelination simply helps the signal (the COMPOSITE signal, saltatory conduction) to travel faster, in which the myelination speeds up the signal, while the action potential allows the signal to be 're-amplified' after some loss or strength under each myelination wrapping. The end result is a signal which is as strong at its ending as it was to begin with at its initiation, and also travels fast enough to be useful. 8. I hope this helped, but if it didn't, perhaps these might: en.wikipedia.org/wiki/Saltatory_conduction www.khanacademy.org/science/biology/human-biology/neuron-nervous-system/v/saltatory-conduction-neurons

[@aterack833]

i have mild crossover, and when something is just right, the smells and the sounds and vision all have a sort of contextual change, certain smells can make me see certain colours better, or less, but typically it just makes movies more interesting if they are good (this might be a normal thing i'm describing weird btw)

[@adamjackson5797]

Where can I get the information ℹ️ what u talk I want to print to out and save it . Thanks

[@jerrydick1714]

i tried to make chess board type table in ms paint and then put their A and B box of same dark color but that does not changes the color when put in the white portion box of the board.

[@sachinphilander492]

thank you G

[@Awholekit]

Its not a complete explanation of a version of a sensory stimulation system (im so depressed and miserable i would love to build a robot sensory system to use what is available to make my feelings better.) We like your video! Maybe all of our Sensory Servers will get creative and use what we have to make the most out of our lost and potentially non functioning input ability to make adequate adjustments to live and the persons involved (Live is so sad right now). 🍏 💚

[@beatrnyigu6120]

thanks it is so amazing video

[@BeyondSleepy]

You're a bit wrong about how the eye works. The rods do not generate an action potential, they are continually generating a graded potential called the dark current which changes in response to when rhodopsin reacts with photons. This generates a chain of changing graded potentials thorough 3 other kinds of cells that organize the information before the last type, amacrine cells, interacts with ganglion cells that generate the action potential.

[@bavl1994]

Awesome !!!!

[@alexedwin3832]

thanks a lot

[@wuendysantana]

Estupendo!

[@ajc669]

When we smell , what are we smelling (in general)?

[@Peacemakerblue]

When people make little movements with their fingers or other body parts and I see it in the corner of my eyes why is it really irritating like I can’t ignore it even if I really tried or if someone is shaking their head vigorously and I’m seeing it why does it have a disturbing effect? Also if they make sounds it overwhelms me and causes me to be anxious like how is this effect possible?

[@holonrumsey9727]

your retina is mostly made out of the rods which detect motion and value primarily which is why you see motion in your periphery so well (also part of why you see motion more than detail at night...) its more complicated than that but thats the best I can do in a you tube comment

[@Peacemakerblue]

Holon Rumsey what do you mean value primarily ?

[@s0000ak]

what does perfect pitch have Tod do with cochlea

[@farshidmansoori4625]

haha what the heck you almost made me deaf by screaming:)

[@japalmer8182]

I found it to basic to grasp a consistent understood to compliment lecturing in respect of minors and young to degree acceptance of information, be kind to me as a student of assessment regarding my own British children's varied age group. one of which ,24 years now teaches much to my delght

[@maheshm2135]

How brain reacts when same thing happens for diferent person is it base on ,.. or family histry or his emotions?

[@davevincent3749]

good job

[@caitlynobrien994]

Wait, but why exactly do other people's houses have different smells? I've always wondered that. Anyone know?

[@augurelite]

Thank you :D

[@acceptabledebb]

I love you.

[@Thelivingwordthesword]

I will completely purify and release my neurosensory system of all natural and negative effects. In doing so i will unleash from my sensory system neuro storm that will only affect those who contributed the pain and suffering caused to y system. All my senses will be cleaned as well as ,y love ones my son and love.

[@rgudduu]

Helpful

[@Mustamaggara]

do you get kicks when people call you Mr. Andersen, mr. Andersen?

[@abdelrahmanemad8610]

1:28 nerve singals 😂😂

[@maheshm2135]

How to improve sences or sencer going ahead.

[@jimtripathi]

2:33 and i dropped my phone on my face

[@APchemistrycourse]

2:33 scared me so bad

[@alpharannomega8728]

If I were to make a slightly louder noise WAAAHHAAAGHOO!!!! Hahaha. Gold!

[@habibullahbinquasem3489]

Awesome

[@michellegenack7577]

awesome

[@33beene]

Post stroke, I can’t smell, but I can taste and I can “feel” the chemicals in some things in my nose. Weird stuff!