1. List the main components of the human digestive system (in order) List three functions of the liver. What is the difference between intracellular and extracellular digestion. Give an example of a specific organism for each type. List the protein digesting enzymes and the location of their action and their production. What are villi? What are their function? What is the role of the large intestine.

2. List four characteristics of water, explain the physical and chemical properties that contribute to it and explain their biological function Draw the functional groups: – Ketone – Hydroxyl – Carboxyl – Amino – Sulfhydryl

3. What is homeostasis? Explain the difference between positive and negative feedback. Give two examples of each. Compare and contrast ectotherm and endotherm animals.