Chemoreceptors located in the carotid bodies are responsible for detecting variations in blood oxygen levels. The chemoreceptors react when oxygen levels fall.
Arteriovenous chemoreceptors, which monitor and react to changes in the partial pressure of oxygen and carbon dioxide in arterial blood, and central chemoreceptors in the brain, which react to changes in the partial pressure of carbon dioxide in their immediate environment, are the two different types of respiratory chemoreceptors.
ASICs are specific chemoreceptors that measure blood carbon dioxide levels. To achieve this, they keep an eye on the amount of hydrogen ions, which lower blood's pH.
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