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Info on stomach contractions and hunger.. We have stomach contraction when we feel hungry, but these are not the only sources of hunger. Define glucose The form of sugar that circulates in the blood and provides the major sources of energy for body tissues. When the level is low, we feel hunger. Info on body chemistry and the brain. Our brain keeps track of our nutrient levels, and when those levels drop, we will feel hungry Info on the hypothalamus and its influence on eating. *The lateral (sides of) hypothalamus brings on hunger; if stimulated we are hungry even if well fed; if destroyed, even starving we will lose appetite *The lower mid hypothalamus (ventromedial hypothalamus) depresses hunger; stimulate and an animal will stop eating; destroy it and the stomach & intestines will process for more rapidly, causing over eating and obesity What are the different appetite hormones? 1) Orexin - hunger triggering from hypothalamus 2) Ghrelin - hunger arousing hormone from empty stomach 3) Obestatin - fullness signal to depress hunger 4) PYY - appetite suppressant 5) leptin - appetite suppressant Define set point THe point at which an individual's 'weight thermostat' is supposedly set. When the body falls below this weight, and increase in hunger and a lowered metabolic rate may act to restore the lost weight. Define basal metabolic rate The body's resting rate of energy expenditure Critics of set point say what? That slow, sustained changes in body weight can alter a set point. Prefer to use settling point to induce the level at which a persons weight settles in response to caloric intake and expenditure.