Hank resists the urge to devour a slice of pizza so that he can walk you through the way we experience our major special senses. It all boils down to one thing: sensory cells translate chemical, electromagnetic, and mechanical stimuli into action potentials that our nervous system can make sense of. Today we're focusing on smell (olfaction) and taste (gustation), which are chemical senses that call on chemoreceptors. As usual, we'll begin with a quick look at how these things can go wrong. Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: https://apple.co/3d4eyZo Download it here for Android Devices: https://bit.ly/2SrDulJ Chapters: Introduction: Anosmia 00:00 How Smell Works 2:13 Olfactory Epithelium 2:47 Olfactory Sensory Neurons 3:19 Glomerulus 3:47 How the Brain Processes Smell 4:48 How Taste Works 6:19 What Are Taste Buds (Taste Receptor Epithelial Cells)? 6:40 Types of Taste Receptor Epithelial Cells: Gustatory and Basal 7:53 How Different Tastants are Sensed 8:37 Review 9:28 Credits 10:05 *** Crash Course is now on Patreon! You can support us directly (and have your contributions matched by Patreon through April 30th!) by signing up at http://www.patreon.com/crashcourse Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Mark Brouwer, Simun Niclasen, Brad Wardell, Roger C. Rocha, Jan Schmid, Elliot Beter, Nevin Spoljaric, Sandra Aft, SR Foxley, Jessica Simmons, Stefan R. Finnerup, Jason A Saslow, Robert Kunz, Jessica Wode, Mike Drew, Steve Marshall, Anna-Ester Volozh, Christian Ludvigsen, Jeffrey Thompson, James Craver, Suzanne, Dustin & Owen Mets, Amy Fuller, Simon Francis, Max Bild-Enkin, Ines Krueger, King of Conquerors Gareth Mok, Chris Ronderos, Gabriella Mayer, jeicorsair, Tokyo Coquette Boutique, Konradical the nonradical *** Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids
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Thank you for this video, very enlightening!
I'm totally throwing a link to this video into the "additional resources" portion of my Chemistry 1010 course for our chapter on molecules of smell and taste! What awesome visuals :)
How long do odor molecules stay on the olfactory epithelium? Is this why sometimes you can still smell something even minutes after you've gotten away from the odor?
Watching this when i know I’m going to be eating pizza for dinner is the most satisfying feeling ever 😂
My kids and I really love this channel and we are super grateful for all those making the videos, it's such a nice way to learn opposed to a textbook where we can't be sure we are pronouncing the words correctly.
trying to pay attention with the pizza there as a student is also hard. kept thinking "man I should order a pizza, that sounds fantastic"
I honestly don't watch these videos to learn but because he makes boring topics interesting
well great now I want pizza haha
Here’s a great tip for all those who have trouble with how fast Hank speaks: open the video in YouTube then click on the settings cogwheel in the corner of the screen then look for the speed setting (for me it’s near the bottom of the list) and choose a slower speed (75% or even less ). Voila!
hangry hank has me cracking up bahaha
it’s okay to question others
I’m here because covid took away my sense of smell
I agree. Its sort of silly that between animations he didn't take a single bit. I agree it's hard not to take a bite of pizza.
he's not just a philosophy teacher?!! oh my god what a legend.
Interestingly, I heard in my physiology class that the amount of things you can smell is controversial. So it’s safe to say you can smell at least 10,000 upward to 1 trillion different kinds of smells!
i dont even know how to thank you for all these very helpful videos. i am a biomedical sciences major and i use your videos to help me understand my biopsychology class ! you are amazing
DESERVES 10 OUT OF 10 Keep making amazing videos!😁
I usually love the Crashcourse series. This one, however, gets TASTE versus FLAVOR mixed up. Smell happens due to the nose. Taste happens due to the tongue. Flavor requires both smell and taste. So for example, a person with anosmia has no smell, has normal taste (can detect all taste qualities), but cannot detect the flavor.
I like the word 'umami' so much that after hearing it I started reciting it like a lunatic and completely lost focus for about a minute
This was perfect info. I have a cold and can’t smell anything so I noticed I in turn cannot taste my food as much. I knew they were connected but got curious as to why/how. Thanks dude!