Charlie and Alex are on the bus to school. Charlie forgot to eat breakfast this morning. Her stomach is starting to rumble.
Getting off the bus, she starts to feel some discomfort. The bus allowed the two of them to arrive 30 minutes early before school started, so Charlie decides to go to the local sweet store across the road to get something to snack on.
Hi, I'm Charlie's pancreas! I create and release insulin into the bloodstream so the muscle cells can take in the glucose! I'm very important to the human body, and if I don't function properly it is called diabetes.
Charlie and Alex enter the sweet store. Charlie asks the lady at the counter for a bag of lollies. The lady then hands the sweets to Charlie who pays her in return. The two girls say thank you and leave the store.
Charlie then eats the lollies. Her body begins the process of Hyperglycemia. This causes her blood sugar levels to suddenly increase. This step is called a Stimulus.
Charlie's Pancreas soon releases insulin. This is Receptor step. The insulin is a hormone that acts as a key to allow the glucose (sugar) in the blood to move into the muscle cells. This step is called an Effector.
Once the glucose is in the muscle cells, the blood sugar levels decrease, and return back to normal. Charlie is no longer hungry! Alex and Charlie return to school right on time for science class!