Final answer:
It is false that some people never experience REM sleep because of no dream recall; REM sleep includes dreaming, but not remembering dreams doesn't mean REM sleep didn't occur. The body also demonstrates a REM rebound effect after deprivation, which underscores its importance.
Step-by-step explanation:
The statement that some people never experience REM sleep as evidenced by these individuals saying that they have no dream recall is false. REM sleep is a period of sleep characterized by brain waves very similar to those during wakefulness, rapid eye movement, and it is the stage of sleep in which most dreaming occurs. Lack of dream recall does not necessarily indicate the absence of REM sleep. People may simply not remember their dreams or may not have dreams that are vivid enough to be recalled upon waking. Additionally, REM sleep is homeostatically regulated - if a person is deprived of REM sleep, they experience REM rebound, which means that they will spend more time in this phase when they are able to sleep without disturbances. This regulatory mechanism indicates the importance of REM sleep for various bodily processes, including learning, memory, and emotional processing and regulation.