1. What are some ways that receptor activation brings about an intracellular response?
2. What is the mechanism of action of a lipid-soluble messenger?
3. How does the term transcription factor relate to lipid-soluble messengers?
4. What is the mechanism of action of a water-soluble messenger?
5. What is the difference between a first and second messenger? Which messenger works INTRAcellularly and which works INTERcellularly?
6. Compare and contrast lipid-soluble and water-soluble messenger pathways.
7. Compare and contrast the four types of receptors for water-soluble messengers.
8. Identify three ways in which signal transduction could be inactivated. Explain how each one works.