William James theorized that people have an unconscious mind.
False
The circadian rhythm is a regular sequence of biological processes, such as temperature and sleep, that occurs every 24 hours.
True
Your senses make it possible for you to be aware of your environment.
True
Sleep stages are defined in terms of brain-wave patterns, which can be measured by an electrocardiogram.
False
Stage 1 is the lightest stage of sleep.
True
During REM sleep, our blood pressure falls, and our heart rate also decreases.
False
Consciousness is the awareness of things that are both inside and outside of ourselves.
True
It is during NREM sleep that we have the most vivid dreams.
False
Freud believed that dreams reflect a person's unconscious wishes and urges.
True
Stages 3 and 4 are characterized as slow wave sleep and are the deepest sleep stages.
True
Narcolepsy is a breathing interruption that occurs during sleep.
False
Hypersomnia is the inability to fall asleep or stay asleep.
False
Alcohol is a stimulant and the most widely used substance in the United States.
False
Many narcotics, such as morphine, heroin, and codeine, are derived from the opium poppy plant.
True
Nicotine is the drug found in tobacco leaves and is one of the most common depressants.
False
Delta waves are the slowest waves in the sleep cycle.
True
