Insight by Food
Dopamine produces stronger motivational effects in brain 'hotspots' because dopamine receptors are unevenly clustered across forebrain regions, so release in dense receptor areas is amplified and more strongly drives behavior.
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See all →When consumed in large amounts, sugar can prevent the normal habituation of dopamine response, so continued high dopamine release sustains reward and incentive to keep consuming similarly to addictive drugs.
Commercial flocks are highly vulnerable to disease because genetic uniformity removes variation in resistance, so a single introduced pathogen can spread across nearly all birds instead of being limited by naturally resistant individuals.
Different spicy foods hit different parts of the head because larger alkylamides like capsaicin tend to stay in the mouth while smaller, more volatile molecules can travel up into the sinuses and stimulate nasal receptors.