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13 Cards in this Set
- Front
- Back
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dermal detection
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light through cuticle to receptors below, no focusing structure, rudimentary light detection, helps set biological clock
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genital photoreceptors
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dermal detectors for oviposition/copulation behavior
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retinula cell
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light sensitive nerve cell
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dorsal ocelli
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unrelated to stemmata, sensitive to slight light fluctuations/low light, limited resolution
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dorsal ocelli functions
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horizon detector, diurnal behavioral rhythms
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stemmata
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lateral ocelli, larvae eyes of holometabola, only info about shape/size/movement/light
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compound eyes
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almost 360 degrees of visualization, repetition of many stemmata-like units
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ommatidia
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optical units of compound eye: cluster of photoreceptor cells surrounded by support/pigment cells
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parts of ommatidia
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cornea, crystalline cone, pigment cells, rhabdom, photoreceptor cells, optic nerve
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rhodopsin
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protein pigment, absorbs light. transfers photon energy to initiate receptor potentials
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How are rhodopsins categorized? |
according to their sensitivity to blue, green, or UV light |
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color vision |
different opsins = different absorption peaks |
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vertebrate vs insect vision |
vert = concave receptor, single lens produces image - insect = convex receptor, multiple lenses |
