1. Compare the amounts of nicotine that are absorbed into the blood stream across the various tobacco products.

2. What happens to nicotinic receptors following chronic use of nicotine?

3. Discuss how acute tolerance differs from other types of tolerance.

4. Compare the amounts of caffeine found in coffee, tea, chocolate, soda, and energy drinks.

5. How does the combined use of nicotine and caffeine affect the metabolism of caffeine?