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Hangry
Though most frequently mentioned as a joke or a jab at someone's food-seeking tendencies, the concept of being "hangry" might, in fact, be the outcome of the activities a collection of brain cells that serve a clear evolutionary purpose. Agouti-related protein (sometimes called agouti-related peptide), or AgRP, is produced in the hypothalamus, which among other things is the part of our brain that regulates subconscious systems like our mood, heart rate, and body temperature.
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