1
What are people who can function well on less sleep than others?
Short sleepers
What is a shortage of sleep that leads to tiredness and to other health problems?
Sleep deficit
What is a hormone released by the pineal gland that increases feelings of relaxation and tiredness?
Melatonin
What is the fatigue that people experience after changing time zones during travel?
Jet lag
This is a stage of light sleep, during which you may experi- ence vivid sensations, or hallucinations. Many people experience a sensation of falling, which may jolt their bodies awake. During this stage, you drift in and out of sleep, and can be awakened easily.
Stage 1
The body’s biological clock follows the cycle of _____.
The sun
This is an active stage of sleep during which your breath- ing changes, becoming irregular, shallow, and more rapid. Your heart rate and blood pressure rise. Your eyes dart about rapidly under your eyelids, and your muscles are temporarily paralyzed.
REM sleep
Which of the following hormones released by the pineal gland increases feelings of relaxation and fatigue?
Melatonin
What are thephysical, behavioral, and mental changes in the body that occur naturally and typically follow the 24-hour cycle of the sun?
Circadian rhythm
This is a transitional stage between light sleep and deep sleep. Your brain waves become even slower.
Stage 3
What is the group of nerve cells in the brain controls many physiological responses in the body, including the sleep-wake cycle, body temperature, hormone levels, and brain wave activity? Give me the ACRONYM
SCN
In this stage, your body temperature starts to drop, and your heart rate slows down. You may have bursts of great brain activity, called sleep spindles.
Stage 2
What is a part of the brain that regulates appetite and energy consumption?
Hypothalamus
This is a stage of deep sleep during which you are dif- fi cult to awaken. The movement of your eyes and your muscle fi activity stop completely.
Stage 4
During which stage of sleep are the brain regions used for learning stimulated?
REM sleep