Which hormone is released by the kidneys to stimulate red blood cell production at high altitudes?
Chapter 1

The architecture of the airway

Chapter 2

The magic of the alveoli

Chapter 3

The mechanics of the breath

Chapter 4

Adapting to the extremes

Chapter 5

The history of discovering respiration

YOUR GOAL

Master of How the lungs capture oxygen

Ch 4 · Adapting to the extremes
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artiteacher Deep-diving mammalian reflexes

Jul 11

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artiteacher Adapting to the extremes

Breathe it in! (Breathe it in!) A tennis court of air opens up within!

Jul 10

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artiteacher Sherpa high-altitude genetics

Jul 11

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Deep-diving mammalian reflexes

artiteacher Humans share an ancient survival reflex that conserves oxygen underwater.

Jul 10

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Andean chest expansions

artiteacher Indigenous populations in the Andes developed physical adaptations to high altitudes.

Jul 10

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Pocket Puffers
BETA

artiteacher Tap the expanding alveoli to discover how your lungs capture oxygen.

Jul 10

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Fun Fact

Snail lungs: Some land snails have a single lung that opens to the outside through a tiny breathing hole called a pneumostome.

Jul 10

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Glossary
hypoxia (noun)
A state in which the body or a region of it is deprived of adequate oxygen supply at the tissue level. In 1978, Reinhold Messner climbed Mount Everest without bottled oxygen, demonstrating human resilience to this condition.

Jul 10

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Gossip

Where would you rather live for a year to test your lungs?

Jul 10

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Quiz

What trigger initiates the mammalian dive reflex in humans?

Jul 10

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artiteacher Andean chest expansions

Jul 11

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Quiz

What physical adaptation is common in indigenous Quechua populations of the Andes?

Jul 10

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artiteacher Training at high elevations

Jul 11

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Quiz

Above what altitude do athletes typically train to trigger natural blood adaptation?

Jul 10

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Quiz

How much can the human heart rate drop during the mammalian dive reflex?

Jul 10

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Quiz

Which hormone is released by the kidneys to stimulate red blood cell production at high altitudes?

Jul 10

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Quiz

Why is thickening of the blood (polycythemia) a risky response to high altitude for lowlanders?

Jul 10

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Quiz

Which organs are prioritized for oxygen delivery during the mammalian dive reflex?

Jul 10

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Quiz

What genetic advantage helps Himalayan Sherpas thrive in thin mountain air?

Jul 10