How does caffeine keep us awake? – Hanan Qasim

How does caffeine keep us awake? – Hanan Qasim

View full lesson: http://ed.ted.com/lessons/how-does-caffeine-keep-us-awake-hanan-qasim

Over 100,000 metric tons of caffeine are consumed around the world every year. That’s equivalent to the weight of 14 Eiffel Towers! Caffeine helps us feel alert, focused, and energetic, even if we haven’t had enough sleep — but it can also raise our blood pressure and make us feel anxious. So how does it keep us awake? Hanan Qasim shares the science behind the world’s most widely used drug.

Lesson by Hanan Qasim, animation by Adriatic Animation.

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20 Responses

  1. Topc Lefty says:

    cool

  2. OmegaPixelf says:

    guys, your the first if your the first to watch it

  3. Endurable Planet says:

    My fish drowned today. 😰😰

  4. MyLife AsEva says:

    The last digit like is what drink you are.

    1. Coffee
    2. Tea
    3. Orange juice
    4. Pepsi
    5. Coca cola
    6. Milk
    7. Water
    8. Smoothie
    9. Wine
    0. Cocktail

    Tell me witch one you got!

  5. Life Starter Pack says:

    I consume half of these Eiffel towers in caffeine every year

  6. Jerrie the claun says:

    If caffeine is a drug, does that mean that Starbucks is a drug dealer?

  7. Rod Kakarot says:

    guys if you are interested in things related to physics see “science asylum” channel once. I promise, you won’t be disappointed. thanks a lot

  8. dont try says:

    coffe vs tea?

  9. hold up says:

    am i the only one who feels sleepy after drinking coffee ??

  10. TitMouseMees says:

    Don’t do coffee kids

  11. Murali manohar Dhassan says:

    does anyone know which one has more coffin contained in coffee or tea?

    Does adenosine are processed only when we are tired or not.
    can anyone here help me out!

  12. Irun Mon says:

    Caffeine doesn’t affect me, I can sleep right after I drink coffee or tea

  13. Michaelcecc says:

    I enjoy covfefe

  14. AnneMarie van Dijk says:

    Why do people say they’re early when they’re actually on time

  15. Dominick says:

    2:44
    There you can see my yellow face when life kicks my hopes away in one day.

  16. Mason Lee says:

    Coffee beans are plants, not drugs.
    Therefore, Starbucks is not a drug dealer, it is a florist.

  17. Sidd Joshi says:

    when it comes to knowledge content
    _5-min of TED-Ed video_ > _a week in my classroom._

  18. Savanna says:

    Science fact: Jesus can walk on water
    Babies are 75% water
    I can walk on babies
    I am 75% Jesus

    Extra Scientific Fact: I am also 100% in jail

  19. Kamna Desai says:

    Why don’t these videos have captions?

  20. Weldon Sirloin says:

    Please make a “How does jerking off keeps us sane?” video.

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