Orexin, also known as hypocretin, is a neurotransmitter that regulates arousal, wakefulness, and appetite.
Topic 7.2: 7.2 Specific Topics in Motivation
Orexin cheat sheet for homework
These are chemical messengers used by neurons to send signals across synapses (the tiny gaps between neurons).
This refers to our 24-hour daily sleep pattern which consists of approximately 16 hours of daytime wakefulness and 8 hours nighttime sleep.
A hormone predominantly made by adipose cells that helps regulate energy balance by inhibiting hunger.