ACP rhinarial plate and odor sensitivity.

(a) Left: Scanning electron micrograph of a rhinarial plate sensillum (arrow). Middle: Schematic of rhinarial plate cross section, showing three ORNs housed in a pit-like structure. Right: Representative action potential traces from a RP4 sensillum showing (top) spontaneous activity with spike amplitudes A, B, and C neurons marked, and (bottom) during a 0.5 sec stimulus with isobutyl acetate (10−2) indicated with a line. (b) Graphs depicting mean ORN responses to 61 odorants that activate and/or inhibit at least one rhinarial plate ORN at 10−2, 10−3, and 10−4 dilution (spikes/sec). N = 3 per stimulus. (c) Dose-response curves. Chemical volatiles were screened at five different concentrations (10−2 to 10−6) against specific RP-ORNs. n = 3. Error bars: SEM.

(a) 左：鼻板感器（rhinarial plate sensillum）的扫描电子显微照片（箭头标注）。中：鼻板横切面示意图，显示3个嗅觉受体神经元（olfactory receptor neuron，ORN）包埋于凹状结构内。右：RP4感器的代表性动作电位轨迹：上图为标注了A、B、C神经元锋电位振幅的自发放电活动；下图为施加0.5秒乙酸异丁酯（10⁻²浓度）刺激时的轨迹，刺激时段以横线标示。(b) 图表展示了61种气味物质对鼻板嗅觉受体神经元的平均响应：这些气味物质在10⁻²、10⁻³、10⁻⁴浓度下可激活或抑制至少一种鼻板嗅觉受体神经元，响应单位为尖峰/秒，每个刺激条件设置3次重复（N=3）。(c) 剂量反应曲线：针对特定RP-ORN，以10⁻²至10⁻⁶共5种不同浓度对化学挥发物进行筛选，每组设置3次重复（n=3），误差棒代表均值标准误（standard error of the mean，SEM）。