What Do You Really Know About Sleep?

A good night's sleep—everyone needs it, but not everyone gets it. We stay up late and get up early, and then wonder why we always feel tired. Why is sleep important? See how much you know about snoozing by taking this quiz.

1. The rapid eye movement (REM) sleep stage is when dreaming occurs. How often does REM happen during the night?

A. 4 or 5 timesB. 3 timesC. 2 timesD. 1 time

2. To function well, adults should average how much sleep a night?

A. 5 hours B. 6 hours C. 7 to 9 hours D. 9 to 10 hours

3. How many Americans suffer from lont-term (chronic) sleep disorders?

A. 10 million B. 50 million to 70 million C. 125 million D. 200 million

4. A sleepless night can have a similar effect on your ability to drive in morning rush-hour traffic as which of these?

A. Using a cellphone while driving B. Using medicines that make you drowsy C. Using alcohol D. None of the above

5. Minor sleep deprivation can affect focus, mood, and what else?

A. MemoryB. Physical performanceC. Ability to do mathD. All of the above

6. Sleepwalking tends to run in families. About how many children does it affect?

A. 3 in 100 to 1 in 20 B. 3 in 20 C. 1 in 4 D. 7 in 20