The Sleep Cycle. Unit 3 Lesson 2. Objectives:. Define sleep Identify the main theories of sleep Differentiate between the stages of sleep. Warm Up. Describe two of the five different levels of consciousness we talked about yesterday. What Is Sleep?.
The Sleep Cycle
Effects On Body
Immune system weakens
Varied body temp
Effects On Brain
Decreased cognitive performance
Learn slower, remember less, loss concentration & creativity