Researchers have found that rem (rapid eye movement) sleep is important to human beings. This type of sleep generally o c curs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence. The deeper a person.s sleep be comes, the longer the periods of rapid eye movement.
There are physical changes in the body to show that a person has changed from nrem (non-rapid eye movement) to rem sleep. Breathing be comes faster, the heart rate in creases, and, as the name implies, the eyes begin to move quickly.
A c companying these physical changes in the body is a very important characteristic of rem sleep. It is during rem sleep that a person dreams,
1. A c cording to the passage, how often does rem sleep o c cur in one night?
A once. B twice.
C four or five times. D forty times.
2. The word "deeper" in paragraph 1 is closest ______ in meaning to which of the following?
A heavier B. louder
C. stronger D. happier
3. Which of the following shows that a person is not dreaming in his sleep?
A his eyes begin to move.
B his breathing be comes faster.
C his heart rate in crease.
D his eyes stop moving.
4. The subject of this passage is ______.
A. why people sleep
B. the human need for rem sleep
C. the characteristic of rem sleep
D. physical changes in the human body
5. Which of the following is the best title of the article?
A. rem sleep. B two types of sleep.
C. sleepers. D what happens to sleepers.
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