Where does this come from, and can I check it?

Carotid bodies fire within seconds when arterial oxygen drops. The figure is taken from NCBI Bookshelf, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a human body fact?

Yes. It sits on the Human Body shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Tiny sensors in the neck detect falling oxygen

Carotid bodies fire within seconds when arterial oxygen drops These small clusters of cells sit where the carotid artery splits, and they hold the body's main rapid oxygen sensors. When oxygen falls, they signal the brainstem to increase breathing depth and rate. Their response is fast enough to adjust ventilation breath by breath. It sits in Mondo's human body collection, one of 200 facts that each trace back to the reference below.

Where this comes from

NCBI Bookshelf

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Science trivia

More facts like this

Oxygen use stays high after exercise endsBreathing and heart rate remain raised for minutes to hours while the body recovers Human lungs have a surface area roughly equal to a tennis courtMillions of tiny air sacs provide massive surface area for gas exchange The diaphragm is the primary muscle responsible for breathingDome-shaped muscle contracts downward to draw air deep into the lungs An adult breathes in over eleven thousand litres of air dailyHumans take roughly twenty thousand breaths per day under resting conditions Nostrils alternate main airflow in a natural cycleErectile tissue congests and decongests nostrils every few hours continuously One haemoglobin molecule carries four oxygen moleculesFour iron-containing haem groups each bind a single oxygen molecule

Tags: oxygen, breathing, sensors

Tiny sensors in the neck detect falling oxygen: the short answers

Where does this come from, and can I check it?: Carotid bodies fire within seconds when arterial oxygen drops. The figure is taken from NCBI Bookshelf, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a human body fact?: Yes. It sits on the Human Body shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.