1. Name four disease/disorders and explain the causes affecting the structures and organs of digestion. 2. A patient has a urinalysis and is found to have a high concentration of urea. What would this indicate about the patient's kidney function? Discuss how the color of urine indicates dehydration. 3. Despite the fact that most individuals are aware of STDs and know what measures they need to take to prevent them, they act otherwise. Research one of the STDs covered in this chapter and report on what an individual can do to protect himself or herself from this disease. List your references. 4. What happens to skin when it is burned? How does the skin's response depend on the severity of the burn?.