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title: Adenosine
created: 2024-11-18T09:18:12
modified: 2025-10-22T22:55:44
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= 腺苷

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* is a key molecule / neurotransmitter that builds up in your brain during wakefulness and triggers/induces sleepiness.
* is a byproduct of cellular energy use, accumulates in the brain throughout the day, promoting one’s need to sleep as levels rise.

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Higher adenosine levels correlate with a stronger feeling of sleepiness, also known as <mark>Sleep Drive</mark> or <mark>Sleep Pressure</mark>.

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* While you are awake, adenosine levels gradually rise, making you feel more tired.
	* Adenosine → APT (“Energy Currency”)
* When you are asleep, adenosine is cleared away, reducing sleep pressure.
	* APT → Adenosine