Orexin
Definition
Orexin, also known as hypocretin, is a neurotransmitter that regulates arousal, wakefulness, and appetite.
Analogy
Imagine orexin as your personal trainer who keeps you awake during those long study sessions and also reminds you when it's time for a snack break so you can refuel.
Related terms
Neurotransmitter: These are chemical messengers used by neurons to send signals across synapses (the tiny gaps between neurons).
Sleep-Wake Cycle: This refers to our 24-hour daily sleep pattern which consists of approximately 16 hours of daytime wakefulness and 8 hours nighttime sleep.
Leptin: A hormone predominantly made by adipose cells that helps regulate energy balance by inhibiting hunger.
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