Body Weight Regulation
Body Weight Regulation is how your body gains, loses, or holds its weight based on what and how much you eat.
A kitchen scale holds two bowls in balance. One bowl holds the food you eat each day. The other holds the energy your body burns. When the food bowl is heavier, your body stores the extra as fat. When the burn bowl is heavier, fat leaves and the scale tips back.
Explaining body weight regulation by grade level
When mice eat sweet candy like jelly beans, they gain weight fast. Mice that eat fruit like apples grow at a slower pace. The kind of food you eat changes how much weight you gain. Your body stores extra food as fat when you eat too much.
Projects that explore body weight regulation
What you eat affects how your body gains or holds its weight. This project compares three groups of mice over one month, each on a different diet. The mice are weighed every two days for a total of fourteen times, showing how diet choices shape weight change over time.
Sugar concentration in food is one factor that shapes how your body gains weight, and the difference between apples and jelly beans makes a clean test case. Apples contain about 50% sugar; jelly beans contain about 70%. Ten young mice are split into two groups of five — one group eats apples for 14 days, the other eats the same weight of jelly beans. You weigh each mouse before and after the two weeks. The jelly bean group gained slightly more weight than the apple group, suggesting that higher sugar concentration plays a role in weight gain.