6. SENSETHRESHOLD VisionA candle flame from 30 miles on a dark night HearingThe ticking of a watch from 20 feet away in a quiet room SmellOne drop of perfume diffused through a small house Taste1 teaspoon of sugar in 2 gallons of water TouchA fly’s wing falling on a cheek from a distance of less than a half an inch

10. 1.In your own words, explain the difference between sensation and perception. 2.Give 2 additional examples of sensory adaptation. 3.How do sensation and perception affect people’s understanding of their environment? 4.How close are you to the absolute threshold for humans? Think about each of the five senses.

26. Section Review

29. Four basic taste qualities: sweetness, sourness, saltiness, and bitterness Flavor, odor, texture, and temperature also influence taste Hot foods can kill taste cells, but they do reproduce Cats cannot detect sweetness