Sleep Answers

The group that needs the most sleep during a 24-hour cycle is __________.

Sleep is a biological function.

Sleep is a kind of temporary coma.

Recovery sleep is necessary when sleep is put off for a while.

Some psychologists suggest that sleep has evolved in order to allow humans to dream.

According to the energy conservation theory of sleep, sleep is an adaptive behavior because sleep __________.

Sleep is an universal biological need.

Going without sleep is actively harmful for every creature that needs sleep.

The brain remains active during sleep.

Most land mammals have the ability to rest one hemisphere of their brains at a time.

As the sleep cycles continue, the proportion of REM sleep in each cycle decreases.

Which of the following most accurately describes the brain during sleep?

During which stage of sleep does body temperature begin to fall?