1. Define pyrosis. 2. Explain how prolonged vomiting leads to acidosis and dehydration. 3. What is indicated by occult blood in the stool of a person with gastroenteritis? 4. Explain why infection was...

1. Define pyrosis.

2. Explain how prolonged vomiting leads to acidosis and dehydration.

3. What is indicated by occult blood in the stool of a person with gastroenteritis?

4. Explain why infection was not thought to be the cause of peptic ulcer in the past.

5. Explain three factors that predispose to peptic ulcer formation.