What are sleep and meditation examples of? Altered states of consciousness Circadian rhythms Meditation Hallucinations Start About This Quiz The Psychology Questions and Answers are designed to challenge your knowledge with psychology questions and answers covering key concepts, theories, and research findings. If you are a student or someone interested in the human mind, these psychology test questions will help you assess your grasp of important topics like cognitive processes, behavior, mental disorders, and psychological experiments. Each question is See more Quiz Preview 2. Why is sleep considered a necessary vital function? Helps people recover from stress Builds up a person's resistance to infection Maintains the brain's proper functioning All of the above Correct Answer A. All of the above Explanation Sleep is considered a necessary vital function because it helps people recover from stress by allowing the body to rest and restore energy levels. It also builds...