6th Grade · Science · Activity · shared by Luke Morgan
Investigate how the human body regulates blood sugar, homeostasis, and feedback loops with this free 6th Grade Science activity.
The Donut Dilemma: A Blood Sugar Mystery
A student named Sam is participating in a health study at school. Before the study begins, Sam has not eaten for four hours. A health professional measures Sam's blood glucose (sugar) level using a small drop of blood. Then, Sam eats one large, glazed donut. For the next two hours, the professional records Sam's blood sugar levels every 30 minutes. Use the data table and the information provided below to investigate how Sam's body reacts to the sugary snack.
The human body works hard to keep its blood sugar levels within a steady range. When you eat foods that have many carbohydrates , like a sweet treat, your body breaks those items down quickly. This causes a type of sugar called glucose to enter your bloodstream, which increases your blood sugar levels. Your body has a special organ that helps manage this change. This organ is the pancreas , and it releases a chemical called insulin.
This chemical works like a key that opens up the tiny cells in your body. Once the cells are open, they can take in the sugar from the blood to use for energy. As the cells take in the sugar, the amount of glucose left in the blood begins to drop. If the levels fall too low, the pancreas releases a different chemical called glucagon. This chemical tells another organ, the liver, to release stored sugar back into the blood.
This regular process of adjustment is called a feedback loop. It is important because it maintains a healthy internal balance called homeostasis. Without this balance, your body would not have the right amount of energy to function well. By working together, your organs ensure that your blood sugar stays at a level that keeps you feeling healthy and active throughout the day.
Sam's Blood Sugar Data
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