WEEKK+6B+NPB+102+2011

WEEKK+6B+NPB+102+2011 - MT2 IS NEXT TUESDAY Part 2...

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1 MT2 IS NEXT TUESDAY MT2 will cover lecture material and all assigned readings up through Week 6 - Perceptual worlds. All exams are cumulative but MT 2 will emphasize material presented since MT1. We will ask you to write out hypotheses on this exam, and to state the level of analysis according to Tinbergen’s 4 questions. This section will be challenging for those who haven’t practiced. Please also bring a scantron to the next exam. THANK YOU to everybody who has handed in exam questions! Part 2: Perceptual Worlds 1. The “Umwelt” 2. What are sensory filters? 3. Chemical Filters 4. Mechanical Filters 5. Electromagnetic Filters Few species see the world as we do. • Human vs Dog http://www.andrewlost.com/ Electrical filters Visual transduction • Polarized light • UV light • IR detection • Electroreception • Magnetoreception Visual transduction What happens? Light (photon) =>ABSORBED BY A VISUAL PIGMENT IN A PHOTORECEPTOR CELL =>TRANSDUCTION EVENT =>VOLTAGE CHANGE => TRANSMISSION OF THE SIGNAL TO OTHER PARTS OF THE RETINA ABSORPTION VOLTAGE CHANGE INTERNEURON LIGHT Rods - low light Cones - color
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www. diycalculator .com/ sp-cvision . shtml DIFFERENCES IN COLOR VISION www.diycalculator.com / sp- cvision.shtml DIFFERENCES IN COLOR VISION http://www.diycalculator.com/imgs/cvision-tri-vs-di.jpg What you see (trichromatic- three cones) What your dog sees (dychromatic - two cones) Take home message - vision differs a lot!!! (MANY BIRDS HAVE FIVE CONE TYPES!!) Electrical filters • The basics of vision Polarized light • UV light • IR detection • Electroreception • Magnetoreception What is polarized light? • Atmospheric particles scatter light to produce a polarization pattern around the sun. • This pattern is evident even on cloudy
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This note was uploaded on 11/24/2011 for the course NPB 102 taught by Professor Hahn during the Spring '09 term at UC Davis.

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WEEKK+6B+NPB+102+2011 - MT2 IS NEXT TUESDAY Part 2...

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