 Allergies [27]
Allergy is a disorder of the immune system often also referred to as atopy.
Antidepressants [29]
An antidepressant is a psychiatric medication used to alleviate mood disorders, such as major depression and dysthymia.
Arthritis [12]
Arthritis is a group of conditions involving damage to the joints of the body.
Cancer [26]
Cancer is a class of diseases in which a group of cells display uncontrolled growth
Cardio & Blood [1]
Risk factors for heart disease: infections
Cholesterol [2]
A fat-like substance called a lipid. It is used to build cell membranes, hormones and bile acids
Diabetes [23]
The inability of the body to produce, or the inability to metabolize, the human hormone insulin; Diabetes insipidus, usually a disorder of the ...
Epilepsy [6]
Epilepsy is a common chronic neurological disorder characterized by recurrent unprovoked seizures
Gastrointestinal [2]
The digestive tract is the system of organs within multicellular animals that takes in food...
General Health [144]
The infant, child or young person?s current health condition
Herbal [18]
Herbal tea, herbal medicine
Hormonal [21]
Hormones - Proteins produced by organs of the body that trigger activity in other locations.
Men's Health [1]
For men on fitness, health, sex, caree
Pain relief [16]
Pain management is the medical discipline concerned with the relief of pain.
Skin care [15]
The skin is the outer covering of the body
Weight Loss [21]
Loss of body weight by dieting or due to various easting disorders or medical conditions.
Women's Health [20]
Find information on women's health issues, and lifestyle at the Women's Health
Awaiting moderation 251 Article
|
Physical side of eating: hunger and satiety PHYSICAL SIDE OF EATING: HUNGER AND SATIETY
When the brain detects the need for food, it presses the body's hunger button. We respond by eating. The swelling stomach eventually sends a chemical message to the brain: "Enough already!" When this feedback message arrives, the hunger system shuts down until the process begins again a few hours later.
At one time, scientists believed that eating was a single process. Hunger and satiety were thought of as opposite sides of the same coin, just as inhaling and exhaling form one complete breathing cycle. In the past few years, however, we have come to look at eating as a series of processes that operate somewhat independently of one another. Hunger, in other words, is a somewhat separate system from satiety.
The discovery of these separate systems changed the way we think about eating disorders. Experts used to believe that anorexia involved a malfunction only in the hunger feedback loop. Although patients usually admit feeling hungry, they somehow condition themselves to ignore those signals. Perhaps the signals are faulty in some way—they may be too weak or are sent along the wrong pathway.
But we now have evidence that anorexia also involves malfunctioning satiety feedback loops. For example, an anorexic's stomach will often be slow in passing food along—a condition known as delayed gastric emptying. It has been well demonstrated that the slowing of stomach emptying in anorexia increases the perception of fullness or satiety. Thus in these people even the presence of a small amount of food in the stomach may trigger satiety signals. Other studies confirm that an anorexic's feelings of hunger and satiety do not necessarily correlate with the actual amount of food in her stomach. Bulimia, too, may arise from abnormalities in both the hunger and the satiety systems.
*40/35/5*
WEIGHT LOSS
«Buy Generic Cialis»
 Print
Viewed: 196
| Keywords for this page: Physical side of eating: hunger and satiety |
|
|
Fresh materia
What are symptoms of endometriosis: bowel symptoms, bladder symptoms, infertility