In respect to biological rhythms and sleep, humans should receive at least 8 hours of sleep every night in order for them to function "properly" on a daily basis.
Given that in reality, this (8-hour sleep) rarely occurs, what role/s does the circadian rhythm play in the lives of individuals and how does Rapid Eye Movement (REM) sleep "factor" into this? How does the lack of sleep affect humans? And, what types of sleep disorders can affect individuals? Have you (or do you know of anyone who has) experienced such sleep disorders?
This is a discussion question no word count requirement, ust a well thought out response.