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Unformatted text preview: physiological functioning. We become tired when it is dark out. Function of sleep is to restore energy levels Function of sleep is to conserve energy We become tired from wakefulness. We sleep until the body is physiologically sound. We sleep based on an internal timing mechanism. Sleep depends on vulnerability from predators. Sleep deprivation may cause behavioral disturbances. We have a sleep-wake cycle. When we sleep is based on some evolutionary aspects. 1. What are the main differences between the recuperation and circadian theories? 2. Which theory do you most agree with? Explain. PSY 240...
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- Spring '10