Homeostasis - hormones
Hormones and homeostasis are somewhat abstract concepts. Students have direct experience of a lot of the actions. For example, they know if they drink a lot of water, they will go to the toilet more often to get rid of the excess water. However, the underlying mechanisms of homeostasis are less clear. The challenge comes in helping students to link the internal biology that is taking place with the experiences they have of their own body.
Feedback loops are an important feature and time should be taken to help students to understand the concept. Without a good grounding in this idea, it is difficult to see how various interactions can maintain a regular state.
It is useful to stress why homeostasis is important and explain why we need to keep a constant body temperature, rather than just studying the process in isolation.
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