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Ch 2 Why We Sleep

Across
Hormone which promotes sleep
Preference for morning or evening
Cross-over
Follows the sun
Disaster
A lack of energy
Fall or drop straight down
gather together and confine
Down
intended for or likely to be understood by only a small number of people with a specialized knowledge or interest.
Within/internal
Adjust
Lowest point
External time-based cues
Part of the cortex which is responsible for planning complex cognitive behavior, personality expression, decision making, and moderating social behavior.
money that is owed and should have been paid earlier.
cause something to rise (or fall) as a step in what is perceived as a steady and irreversible process.