David is a 6'3", 320-pound, middle-aged man who feels tired all the time and suffers from a variety of issues including sleep difficulties, irritability, memory issues, and depression. Use each term below to explain why David might be having these issues. Sleep deprivation (sleep debt) Stage 3 sleep REM sleep Sleep apnea Suprachiasmatic nucleus Alcohol

The likely reason that David is experiencing this symptoms or the current issues that he is facing is because he is probably experiencing sleep deprivation. This is a condition where in a person does not have enough sleep in which David has and that it could cause effects in the brain, as well as it will affect the cognitive function where in, David experiences memory issues.