Tue, May-04-04, 00:12
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Senior Member
Posts: 2,018
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Plan: Atkins
Stats: 320/220/195
BF:
Progress: 80%
Location: Pensacola, FL
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Psychology Themes & Variations
Fifth Edition - Briefer Version
Wayne Weiten
Chapter 10: Motivation and Emotion
The Motivation of Hunger and Eating
Page 296
Quote:
Hormonal Regulation
A variety of hormones circulating in the bloodstream also appear to contribute to the regulation of hunger. Insulin is a hormone secreted by the pancreas. It must be present for cells to extract glucose from the blood. Indeed, an inaqequete supply of insulin is what causes diabetes. Many diabetics are unable to use the glucose in their blood unless they are given insulin injections. In nondiabetic individuals, insulin injections stimulate hunger. Normal secretion of insulin by the pancreas is also associated with increased hunger. And, in landmark research, Judith Rodin (1985) demonstrated that the mere sight and smell of enticing food can stimulate the secretion of insulin. Moreover, insulin levels appear to be sensitive to fluctuations in the body's fat stores (Seeley et al., 1996). These findings suggest that insulin secretions play a role in the modulation of hunger.
Finally, the recent dicovery of a previously undetected hormone, since christened leptin, has shed new light on the hormonal regulation of hunger (Halaas et al., 1995). leptin is produced by fat cells throughout the body and releasedinto the bloodstream. Higher levels of fat generate higher levels of leptin (Schwartz et al., 1996). Lepting circulates through the bloodstream and ultimately provides the hypothalamus with information about the body's fat stores (Campfield et al., 1995). When leptin levels are high, the propensity to feel hungry diminishes. Leptin apparently activates receptors in the brain that inhibit the release of neuropeptide Y, which leads to activity in the pariventricular nucleus of the hypothalamus, which in turn inhibits eating (Stephens et al., 1995).
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God help us if they ever invent Smell-O-Vision. I wouldn't put it past McDonalds to design their commercials to make folks go Hypoglycemic and thus induce cravings for Carbohydrates [McDonalds Food.]
Last edited by cc48510 : Tue, May-04-04 at 00:18.
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sweet taste-insulin
Linear Mode
