Using this reference ( not AI) answer the following questions.

1. Think about the terms consciousness and wakefulness.Compare these two terms. What are their differences? You may include examples for clarification.

2. We know that circadian rhythmsinclude periods of sleep and wakefulness every 24 hours for most people. Briefly explain whywe need to sleep? What is the benefit of sleep to the human brain and body?

3. The negative health consequences of both alcohol and tobacco are well-documented. Some studies show that marijuana is relatively safe compared to these other two substances. Why do you think marijuana continues to be illegal in many U.S. states?

4. Briefly describe or use the chart below to summarize the four categories of psychoactive drugs discussed in section 4.5 of our textbook. Include the categories, actions on the nervous system and at least two specific drug names for each category.

Categories:
Action:
Drug Names: