And the digestive system

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Facts about homeostasis and the digestive system

"The concept of homeostasis is widely used, in physiology and psychology, to identify what seems to be a general attribute of living organisms: the tendency to maintain and restore certain steady states or conditions of the organism. An obvious example is that of body temperature, which in the human tends to fluctuate only in a narrow range about the value 98.6° F. When the temperature rises above the normal range, corrective reflexes (perspiration, reduced metabolism, etc.) go into action to restore the steady state. Persistent deviation may initiate other actions (moving into the shade, plunging into water, etc.). If body temperature drops, other corrective actions are observed.Many bodily steady states follow this pattern. Blood glucose level, blood pH, and osmotic pressure are examples. The key concepts are: an observable steady state that persists over time with minor changes; thresholds above and below this normal range; a sensory input that reports changes in the steady state; and effector mechanisms for restoring the steady state."

* I got this information from Encyclopedia.com.*

The Foods We Eat!

"Every day, nearly one-third of U.S. children aged 4 to 19 eat fast food, which likely packs on about six extra pounds per child per year and increases the risk of obesity, a study of 6,212 youngsters found. The numbers, though alarming, are not surprising since billions of dollars are spent each year on fast-food advertising directed at kids, said lead author Dr. David Ludwig, director of the obesity program at Children's Hospital Boston.

The findings suggest that fast-food consumption has increased fivefold among children since 1970, Ludwig said.

The nationally representative study included boys and girls from all regions of the country and different socio-economic levels.Fast-food lovers consumed more fats, sugars and carbohydrates and fewer fruits and non-starchy vegetables than youngsters who didn't eat fast food. They also consumed 187 more daily calories, which likely adds up to about six pounds more per year, the study found."

* I got this information from cbsnews.com*