Homeostasis

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Fun 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.

System interactions

The Foods We Eat

junk food is typically is low in nutrients and high in calories from added sugars, starches or fats. Here is a list of negative effects because of junk food:


A negative effect of junk food on children is rapid weight gain, often leading to excessive weight and sometimes obesity. This is because it often tastes good, is not very filling and is high calorie. Candy, soft drinks, French fries and other fried foods, pizza, burgers, baked goods and ice cream are examples of high-sugar or high-fat foods which provide hundreds of calories per day for the typical American youth ages 2 to 18, type two diabetes, Nutritional Deficiencies, Cardiovascular Disease,


Obesity: Junk food enthusiasts are prone to put on weight, especially when they eat this kind of food very often. The fat and processed flour only make people fatter and unhealthier, as does the oil and grease that are used for fries, chips, donuts and other deep-fried foods. Statistics even show people who eat junk food tend to accompany it with sodas and alcohol, which are either laden with sugar or empty calories and both increase a person’s tendency to put on weight.