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What REALLY Happens When You Step on a Lego: Nervous & Endocrine Systems: Crash Course Biology #46

What REALLY Happens When You Step on a Lego: Nervous & Endocrine Systems: Crash Course Biology #46

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Rating: 4.0; Vote: 1
If cells and organs never talked to each other, an animal would fall apart faster than a boy band after the popular one goes solo. Thankfully, that’s where the nervous and endocrine systems come in! In this episode of Crash Course Biology, we’ll learn how they use neurons, hormones, and more to keep animals’ bodies coordinated. Introduction: Internal communication in animals 00: 00 Why communication matters 01: 01 The nervous system 01: 58 What happens when you step on a Lego 03: 48 Hormones 06: 19 Fight or Flight 08: 01 Review & Credits 09: 07 This series was produced in collaboration with HHMI BioInteractive, committed to empowering educators and inspiring students with engaging, accessible, and quality classroom resources. Visit for more information. Check out our Biology playlist here: Watch this series in Spanish on our Crash Course en Español channel here: Sources: Crash Course is on Patreon! You can support us directly by signing up at Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Leah H, David Fanska, Andrew Woods, DL Singfield, Ken Davidian, Stephen Akuffo, Toni Miles, Steve Segreto, Kyle & Katherine Callahan, Laurel Stevens, Burt Humburg, Perry Joyce, Scott Harrison, Mark & Susan Billian, Alan Bridgeman, Breanna Bosso, Matt Curls, Jennifer Killen, Jon Allen, Sarah & Nathan Catchings, team dorsey, Bernardo Garza, Trevin Beattie, Eric Koslow, Indija-ka Siriwardena, Jason Rostoker, Siobhán, Ken Penttinen, Nathan Taylor, Barrett & Laura Nuzum, Les Aker, William McGraw, Vaso, ClareG, Rizwan Kassim, Constance Urist, Alex Hackman, Pineapples of Solidarity, Katie Dean, Stephen McCandless, Wai Jack Sin, Ian Dundore, Caleb Weeks __ Want to find Crash Course elsewhere on the internet Instagram - Facebook - Twitter - CC Kids:
Date: 2024-06-12

Comments and reviews: 3


A picky correction: the brain doesn’t use the pain it’s the brain the generates the pain. The nerves that first start the process when you step on the lego are nociceptors, not pain sensors. The nociceptors sound the warning, as you said, but it’s not coming in as pain, just a potential or actual damage signal. Pain neuroscience takes this distinction seriously.
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love the topic and the presentation as well, but maybe could you not do so many of the same sound effect autistic here, and I find it distracting and. well annoying is not the right word but close enough. very useful and entertaining videos otherwise: )
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I have a processing delay as a result of a neurological disorder. I might stare at that pop quiz sign for a good few seconds before any emotional reaction kicks in. I also can't safely drive.
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