Last night, Piper was eating dinner with her girlfriend. The food that she bought was a few weeks expired, but she thought it would be okay.
But the next morning, Piper had a terrible stomach ache.
She to the bathroom and threw up.
She wondered why she was throwing up. And why wasn't she at homeostasis?
And then Piper knew! She ate expired food: that was the disruption. Her stomach hurt: that was the indicator. And her throwing up: that was the regulation. Now that she felt okay, that meant Piper knew she was at homeostasis.
Piper was glad to know how to maintain her homeostasis. She went out again with her girlfriend, but this time, she made sure it was fresh food.