1.          Define the term homeostasis.
2.          What is thermoregulation?  
3.          What is the role of the hypothalamus in thermoregulation?
4.          List three ways animals regulate the temperature of their bodies.  
5.          What is negative feedback?  
6.          Why is homeostasis often referred to as dynamic equilibrium?  
7/8.       Explain in a paragraph or two how guard cells and stomata regulate the water content within a plant.  
9.          List two adaptations possessed by desert plants which help them to save water.
10.        Identify the structure in the brain which detects changes in carbon dioxide which control the breathing rate.