10 17 08 SI A ECL 365 1 What is the organ of vision a Eyes 2 What is another name for photoreceptors a Light receptors 3 What are the three layers of the eyeball a Sclera choroid retina 4 is transparent and bends light and the regulates the light opening or the The is behind the iris and helps focus a Cornea iris pupil lens 5 What are the types of photoreceptors found in the eye Describe each a Rods achromatic lower visual acuity good for vision in dim light b Cones color vision higher visual acuity good for vision in light color discrimination 6 Where is it rhodopsin a Found in rods 7 How is light detected a Light photon strikes rod activates rhodopsin enzymatic activity of opsin amplifies photon generates and propagates a nerve impulse info sent to CNS 8 What wavelengths colors do photopigments generally respond to a Blue green red 9 What is the wavelength range most vertebrates can see a 400 750 nm 10 Violet is while red is a Short long 11 What is the area that is scanned by eyes a Visual field 12 Describe monocular vision a Many vertebrates with lateral eyes have monocular vision b Vision field of left and right eyes do not overlap c Allows large vision field but poor discrimination of distances 13 Describe binocular vision a b c d Vertebrates with frontal eyes are capable of binocular vision Visual field of left and right eyes with broad overlap Allows depth perception see in 3 D and accurate location of objects Somewhat reduced field of view both eyes facing same area 14 True False It is impossible for vertebrates to have both monocular and binocular vision a False 15 How is the visual field different between prey and predators a Prey larger visual field greater monocular vision b Predator smaller visual field more binocular vision maybe more binocular than monocular 16 Name some aquatic adaptations a Amphibious fish with 4 eyes i 2 pupils eye aquatic and aerial vision b diving birds with dual focus for aerial and aquatic vision 17 Describe the differences in pupils shape a Round Only nocturnal or diurnal b Vertical Nocturnal sometimes active in day Allows more complete closure c Vertical pinhole Several images yield great depth of field despite monocular d Horizontal Allows wide angle scanning Good in wide open habitats 18 Describe the third eyelid a Nictitating membrane b Transparent c Prevents drying and helps cleanse eye d Found in diverse vertebrate groups 19 Color vision is found mainly in animals a diurnal 20 Which vertebrate groups have good color vision a Many fish salamanders frogs reptiles most birds some primates 21 True False It is difficult to determine if an animal has color vision a True 22 Color vision increases and a contrasts and discrimination 23 Some vertebrates can sense heat and cold with receptors a Dermal 24 Pit vipers have a pair of organs to detect heat which are the most least sensitive receptor in animals fill in the blank and circle one a Pit 25 True False Most pit vipers can in one second and at half a meter detect a mouse that is 10C warmer than the surroundings a True 26 True False rattlesnakes are deterred by California ground squirrels waving their tales thus producing an infrared signal a True 27 True False The ground squirrels in question 25 are aware of the infrared signal they produce a False 28 How do fish that can receive and emit electromagnetic signals use their electricity a Detect stun prey and navigate and communicate in turbid waters 29 True False Magnetism is well understood though it is not often demonstrated a False magnetism
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