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| In insects ]s on the antennae express bind to ] molecules and ]s. The neurons that express these receptors signal this binding by sending ]s down their ]s to the antenna lobe in the insect ]. From there, ]s in the antenna lobe connect to ] that identify the odor. | In insects ]s on the antennae express bind to ] molecules and ]s. The neurons that express these receptors signal this binding by sending ]s down their ]s to the antenna lobe in the insect ]. From there, ]s in the antenna lobe connect to ] that identify the odor. | ||
| The three basic segments of insect '''antennae''' are the ](the base), the ](the stem) and the ](the remaining portion with subsegments known as flagellomeres.) | |||
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Revision as of 23:34, 17 October 2005
For other uses, see the Antenna disambiguation page.
Antennae (singular antenna), are the paired appendages connecting to the first (and in crustaceans also to the second) segment of the head of the members of all subphyla of the arthropods except Chelicerata. Also the members of the order protura lack them.
Antennae are jointed, and in crustaceans branching, they generally extend forward of the animal and are known to be sensory organs, although the exact nature of what they sense and how they sense it is often not entirely clear. It appears that their function can include sensing of any or all of touch, air motion, heat, vibration (sound) and olfaction (smell/taste).
In insects olfactory receptors on the antennae express bind to odor molecules and pheromones. The neurons that express these receptors signal this binding by sending action potentials down their axons to the antenna lobe in the insect brain. From there, neurons in the antenna lobe connect to mushroom bodies that identify the odor.
The three basic segments of insect antennae are the scape(the base), the pedicel(the stem) and the flagellum(the remaining portion with subsegments known as flagellomeres.)
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