Chapter 31 - 31 SENSORYPERCEPTION ChapterOutline...

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31 SENSORY PERCEPTION Chapter Outline IMPACTS, ISSUES: A WHALE OF A  DILEMMA 31.1 OVERVIEW OF SENSORY PATHWAYS 31.2 SOMATIC SENSATIONS 31.3 SAMPLING THE CHEMICAL WORLD Sense of Smell Sense of Taste 31.4 KEEPING THE BODY BALANCED 31.5 COLLECTING, AMPLIFYING, AND   SORTING OUT SOUNDS Properties of Sound The Vertebrate Ear 31.6 DO YOU SEE WHAT I SEE? Requirements for Vision The Human Eye Visual Accommodation 31.7 FROM THE RETINA TO THE VISUAL  CORTEX 31.8 VISUAL DISORDERS Color Blindness Lack of Focus Age-Related Disorders SUMMARY SELF-QUIZ CRITICAL THINKING Objectives 1. Describe and  note examples of each of the six general categories of sensory receptors. 2. Contrast the mechanism  by which the chemical and  somatic senses work. 3. Understand  how  the senses of balance and  hearing  function. 4. Identify and  describe the function of each of the parts of the human  ear. 5. Describe how  the sense of vision has evolved  through  time. 6. Identify and  describe the function of each of the parts of the human  eye. Key Terms amplify (amplitude) camera eyes chemoreceptors choroid ciliary body cochlea compound  eyes cone cells cornea dynamic equilibrium eyes hair cells inner ear iris lens mechanoreceptors middle ear olfaction olfactory receptors optic nerve organs of equilibrium osmoreceptors outer ear pain pain receptors pheromones photoreceptors pupil retina rod cells sclera semicircular canals sensation sensory adaptation sensory system somatic pain somatic sensations  sound  frequency static equilibrium stimulus thermoreceptors vestibular apparatus visceral pain visual accommodation visual field Sensory Perception 21
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Lecture Outline Impacts, Issues: A Whale of a Dilemma A. Whales move using acoustical cues. 1. Sound  moves five times faster in water than air. 2. Whales have more neurons to collect auditory information. 3. Jaws pick up  the vibrations, which travel through  a layer of fat to the middle  ear. B. Whales use echolocation. 1. They emit high-pitched  sounds  that bounce off objects. 2. Noise from human  endeavors, like new  military sonar systems, may be raising havoc  with whale acoustical systems. 31.1 Overview  of Sensory Pathways   A. The sensory system  is part of the nervous  system. 1. In vertebrates sensory neurons detect stimuli. 2. The brain processes the stimuli giving rise to a sensation. B. Each stimulus  is a form of energy that activates sensory receptors. 1. Mechanoreceptors  detect forms of mechanical energy (pressure, position, and   acceleration). 2.
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Chapter 31 - 31 SENSORYPERCEPTION ChapterOutline...

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