Dr. Pert, a NIH researcher, who led studies identifying opioid receptors in the brain and changed perspectives about addictive behaviors, indicated that a specific neuropeptide (neurotransmitter than affects moods) appeared to be associated with each core emotion so a person can experience only one core emotion at a time (although the emotions can alternate rapidly). Moreover, each emotion exhibits differing gestures, postures, behavioral patterns, memories, and facial expressions. They create similar physiological markers, however, that involve a wide range of bodily changes (e.g., rapid heart rate, sweaty palms, stomach butterflies, flushed or pale face, changes in breathing, triggering secretion of hormones and neuropeptides). All emotions are positive and some are also protective—each designed to help you become aware of specific sensory stimuli and to manage specific situations appropriately. Behaviors related to emotions are often mismanaged, resulting in negative outcomes. More tomorrow.