Q1. The human body manifests physiological changes in every organ system throughout the process of eating, from the time a person first anticipates food to the elimination of waste.

a) Propose a controlled experiment where you test the hypothesis that the body’s reaction to eating begins before food enters the body.

b) Explain physiological changes that occur in three different organ systems when food is ingested and how these systems coordinate a response in the human body.

Q2. What is meant by term proto-oncogen? Give examples of types of proto-oncogene and discuss how changes to their normal functions are significant in the development of cancer?