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10 Cards in this Set
- Front
- Back
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gustatory chemoreceptors function, location, and connection
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taste, found on mouthparts/ovipopositor/legs, connect with interneurons in ganglia of same segment
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olfactory chemoreceptors function, location, and connection
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"smell", antennae/palps, axons terminate in deutocerebrum
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Generalized cascade of chemoreception
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trap chemical molecules, transfer to recognition site, depolarize specific membrane, stimulate nerve impulse, associated behavior
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gustatory chemoreceptors
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uniporous, soma of hairlike trichoid sensilla beneath hair, dendrites extend into shaft to reach pore, contain specialized GRNs, may express several different taste receptors
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olfactory chemoreceptors
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multiporous, hair/peg-like, each sensilla differentially tuned to different chemicals, pores lead to pore kettel (chamber)
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chemoreceptors and OBPs
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semiochemicals are hydrophobic, need OBP to transport to OR, tormogen/trichogen cells secrete OBPs into sensillum-lymph cavity
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specificity of receptors and OBPs
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typically specific receptors, OBPs one-to-one matched with each semiochemical
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electroantennogram
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measures response of sensilla to chemical
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Draw sensillum and describe what it does. Include descriptions of what each part does. |
Transmit messages to CNS for integration. Sensory neurons, tormogen cell (creates socket), tricogen (creates shaft of hair), thecogen cell (creates axon sheath) |
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GRs/ORs |
G-coupled receptors, trichoid sensilla |
