BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a person falls into a deep sleep.
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the muscles relax, and body temperature, blood pressure, and heart and respiratory rates start to fall.
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a person begins to relax and feels drowsy
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the muscles are very relaxed and body temperature, blood pressure, and heart and respiratory rates are at their lowest levels.
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The muscles are paralyzed, and body temperature, blood pressure, and heart and respiratory rates increase.
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Detailed explanation-1: -During REM, the brain is very active, and dreams are at their most intense. But the voluntary muscles of the body-arms, legs, fingers, anything that is under conscious control-are paralyzed. Exactly how the muscles are paralyzed has been a mystery, however.
Detailed explanation-2: -Nerve pathways in the brain that prevent muscles from moving are active during normal REM or dreaming sleep, resulting in temporary paralysis of your body. In REM sleep behavior disorder, these pathways no longer work and you may physically act out your dreams.
Detailed explanation-3: -As you cycle into REM sleep, the eyes move rapidly behind closed lids, and brain waves are similar to those during wakefulness. Breath rate increases and the body becomes temporarily paralyzed as we dream.