Define gustation and olfaction in insects and where these senses are commonly located.

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Multiple Choice

Define gustation and olfaction in insects and where these senses are commonly located.

Gustation and olfaction are the two chemical senses insects rely on to evaluate their surroundings. Gustation is the sense of taste, detecting soluble chemicals that come into contact with a surface or are ingested. Insects use gustatory receptors housed in gustatory sensilla—tiny sensory structures on mouthparts such as the labrum, mandibles, and maxillae, and also on the tarsi (the distal part of the legs). Olfaction is the sense of smell, detecting volatile chemicals in the air, with olfactory receptors housed in olfactory sensilla, most densely on the antennae and also on other exposed surfaces like the maxillary palps in some species. The sensilla contain neurons that convert chemical cues into neural signals, guiding behaviors like feeding, host seeking, and oviposition. So the common locations for these senses are mouthparts, antennae, and tarsi.

Gustation and olfaction are the two chemical senses insects rely on to evaluate their surroundings. Gustation is the sense of taste, detecting soluble chemicals that come into contact with a surface or are ingested. Insects use gustatory receptors housed in gustatory sensilla—tiny sensory structures on mouthparts such as the labrum, mandibles, and maxillae, and also on the tarsi (the distal part of the legs). Olfaction is the sense of smell, detecting volatile chemicals in the air, with olfactory receptors housed in olfactory sensilla, most densely on the antennae and also on other exposed surfaces like the maxillary palps in some species. The sensilla contain neurons that convert chemical cues into neural signals, guiding behaviors like feeding, host seeking, and oviposition. So the common locations for these senses are mouthparts, antennae, and tarsi.

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