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Glucose
the form of sugar that circulates in the blood and provides the major source of energy for body tissues. When its level is low, we feel hunger.
Ghrelin
hunger associated hormone secreted by empty stomach
Oxrein
Hunger triggering hormone secreted by hypothalamus
Leptin and PPY
decrease hormone level
Set Point
the point at which the “weight thermostat” may be set. When the body falls below this weight, increased hunger and a lowered metabolic rate may combine to restore lost weight.
Basal Metabolic Rate
the body's resting rate of energy output
Obesity
defined as a body mass index (BMI) measurement of 30 or higher, which is calculated from our weight-to-height ratio. (Individuals who are overweight have a BMI of 25 or higher.)
Note 
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