Sleep Cycle

Muhammad's alarm is about to wake him up for school while he is in the middle of dreaming about going to a concert. He is more likely to be experiencing...

• NREM

• REM

Jonah is in the middle of his sleep when his sister notices him twitching. He is likely to be experiencing...

• NREM

• REM

In the middle of the night, Sophie notices her friend Lily is increasingly still while at a sleepover, not even moving an inch. She is likely to be experiencing.

• NREM

• REM

Christiano falls asleep in class and is immediately woken up by his friend. He does not remember having any dreams. He is likely to be experienced...

• NREM

• REM

A proportion of a sleep episode that consists of at least one stage of NREM sleep and REM sleep.

• sleep cycle

• circadian rhythm

• NREM sleep

• sleep episode

The 24-hour cycle involving changes in our biological functions.

• circadian rhythm

• ultradian rhythm

• REM sleep

• sleep

A type of sleep that involves rapid eye movement.

• REM sleep

• NREM sleep

• sleep cycle

• sleep episode

A type of sleep that is broken into 4 stages and is characterised by an absence of rapid eye movement.

• REM sleep

• NREM sleep

• sleep cycle

• circadian rhythm

A naturally occurring altered state of consciousness that involves a reduced ability to engage with internal and external stimuli.

• sleep

• 4

• dreaming

• NREM

Non rapid eye movement (NREM) sleep constitutes approximately of ______% of a sleep episode whereas rapid eye movement (REM) sleep constitutes approximately ______% of a sleep episode.

• 10-15 ; 85-90

• 20-25 ; 75-80

• 85-90 ; 10-15

• 75-80 ; 20-25