States of Consciousness Instructions: Match the following concepts to their definition. Circadian Rhythm Consciousness Sleep Debt Homeostasis Melatonin Blindsight Sleep Paradoxical Sleep 1. Tendency to maintain a balance, or optimal level, within a biological system 2. Awareness of internal and external stimuli 3. Result of insufficient sleep on a chronic basis 4. State marked by relatively low levels of physical activity and reduced sensory awareness that is distinct from periods of rest that occur during wakefulness 5. The effect during REM sleep where we have high brain activity but paralysis of the muscle systems 6. Biological rhythm that occurs over approximately 24 hours 7. Hormone secreted by the endocrine gland that serves as an important regulator of the sleep-wake cycle 8. Evidence that some of our visual perception of the world takes place outside of our awareness