The shape of wind receptor hairs of cricket and cockroach
The shape of wind receptor hairs of cricket and cockroach
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DOI：
10.1007/s003590050246
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发表时间：
1998-08-01
影响因子：
2.1
通讯作者：
Baba, Y
中科院分区：
文献类型：
--
作者：
Kumagai, T;Shimozawa, T;Baba, Y
我们检查了蟋蟀和蟑螂的丝状风感受器毛发的确切形状。扫描电子显微镜测量的距离发梢不同距离的头发直径揭示了意想不到的头发形状。我们先验地预计，头发的形状将是一个细长的线性锥形，但测量结果显示，头发的形状是极其细长的抛物面。风感受器毛的直径随离毛尖距离的平方根而变化，即直径随离毛尖距离的增加而迅速增大，且与基部直径渐近。蟋蟀（Gryllus bimaculatus）和蟑螂（Periplaneta americana）都显示出相同的毛发形状。在这两种昆虫中，风感受器毛在变态过程中的形成似乎是由一个共同的细胞学程序控制的。毛发的形状限制了风感受器毛发的流动性，因为运动空气产生的阻力和运动动力学的转动惯量都是轴直径的函数。头发的形状是一种生物特征，它影响传递到中枢神经系统的感觉信息。
We examined the exact shapes of the threadlike wind-receptor hairs in the cricket and cockroach. The diameters of hairs at various distances from the hair tip as measured by scanning electron microscopy revealed unexpected hair shapes. We had expected, a priori, that the shape of the hair would be a slender linearly tapered cone, but the measurements revealed hairs in the form of extremely elongated paraboloids. The diameter of the wind-receptor hairs varies with the square root of the distance from the hair tip, i.e., the diameter rapidly increases with the distance from the tip and is asymptotic to the base diameter.Both the cricket, Gryllus bimaculatus, and the cockroach, Periplaneta americana, showed the same hair shape. In both insects, the formation of the wind-receptor hair during metamorphosis seems to be controlled by a common cytological program. The shape of the hair constrains the mobility of the wind-receptor hair, because both the drag force caused by moving air and the moment of inertia of motion dynamics are functions of shaft diameter. The shape of the hair is a biological trait which affects the sensory information transmitted to the central nervous system.