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39 Cards in this Set
- Front
- Back
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brain
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supraoesophageal
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central nervous system
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brain and ventral cord
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protocerebrum
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associated center for learning, nerves from eyes
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deutocerebrum
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nerves from antennae
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tritocerebrum
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connects to ventral nerve cord
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ventral nerve cord
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one pair of fused ganglia per segment
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subesophageal ganglion
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3 fused mouthpart ganglia
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pheripheral nervous system
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sensory and motor
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sensory
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nerves from receptors
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motor
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nerves to muscles and glands
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sensory receptors
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sensilla
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sensilla
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transduce to electrical signal in sensory nerve dendrite
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mechanical receptors
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all derived from setae
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trichoid
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seta in socket
hair like senses movement, danger, kknows if its touching something mechanical receptors |
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campaniform sensillum
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done of thin cuticle, stresses in cuticle
touch receptors |
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scolopophorous sensillum
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not visible externally. relative to change in position of 2 body parts
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proprioreceptors
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stimuli from body itself
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johnstons organ
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scolopophorous sensilla orginate on the pedicel of antennam imsert in membranes of flagellum
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tympanic organ
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sound reception grasshoppers, moths, cicadas, aquatic bugs
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tympanum
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stretched over air sac, scolopoporous sensilla
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chemical receptors
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contact and distance
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contact chemical receptors
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liquid (gustation) - near mouth
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distance chemical receptor
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gaseous (olfaction) - antenna
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photoreceptors
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visual organ
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what do the photoreceptors consist of
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ommatidia
corneal lens crydtalline corneal pigment cell retinular cells retinular cells rhabdome rhodopsin iris cells |
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compound eye
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1-28000 ommatidia
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corneal pigment cell
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prevents light from scattering
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retinular cells
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specialized nerve cells
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rhodopsin
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derived from vitamin A, in rhabdomere - visual pigment
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iris cells
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surround ommatidium
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mosaic image formation
simple eyes |
single lens
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mosaic image formation
ocelli |
adults amd hemimetabolous immatures. no image formation. stimulate compound eyes
like an on/off switch |
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mosaic image formation
stemmata |
immatures of holometabola. image forming
like having compound eye bur simple |
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vision characteristics of mosaic image formation
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less resolution- poor from perception better motion and distance perception
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color vision ( mosaic image formation )
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shorter wavelengths ( see ultraviolet, not red )
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plane of polarized light ( mosaic image formation )
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preferential vibration of light waves
- passing through air - varies according to position of observer and sun, giving pattern of sky - used for navigation |
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infrared reception
geomagnetic field |
used by bees, used to tell time of day
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infrared reception
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mosquitos use infrared light/ see heat coming off humans
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mosaic image formation
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how flies see. looks like pixels, individual clicks of light the show movement
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