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An experimenter wanted to test the effects of cigarette smoking on rats. She infused the cages of 50 rats with cigarette smoke and the cages of another 50 rats with pure, clean air. The rats that received the clean air were the ____.
Voluntary Muscles
Muscles that are under conscious control, allowing movements such as walking, grabbing, or speaking.
Brain Waves
Electrical patterns generated by the brain that can be measured and are indicative of different states of consciousness.
Sleep Duration
The amount of time spent in various stages of sleep during a typical sleep cycle, including both REM and non-REM sleep.
N2 Sleep
A stage of sleep characterized by sleep spindles and K-complexes, marking a deeper sleep than N1 and preceding the deeper states of N3 and REM sleep.
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