The Propulsion of Sea-Urchin Spermatozoa
The Propulsion of Sea-Urchin Spermatozoa
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发表时间：
1955-12
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影响因子：
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通讯作者：
J. Gray;G. Hancock
中科院分区：
文献类型：
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作者：
J. Gray;G. Hancock
1. 本文讨论了鞭毛推进的一般理论，并给出了一个表达式，通过这个表达式，精子的推进速度可以用穿过民兵沙马精子尾部的波的振幅、波长和频率来表示。2. 所得到的表达式适用于振幅相对较大的波，并考虑到存在惰性头。3. 计算得到的推进速度与观测数据几乎一致。除非精子的头部比沙米契诺鱼的头部大得多，否则它的存在对推进速度的影响相对较小。电池的大部分能量都用在克服尾巴的切向阻力上。4. 虽然当波浪沿着尾翼传播时，其振幅可能会发生变化，但后者的推进特性可以预期与产生相同平均振幅的波浪的尾翼的推进特性非常相似。
1. The general theory of flagellar propulsion is discussed and an expression obtained whereby the propulsive speed of a spermatozoon can be expressed in terms of the amplitude, wave-length and frequency of the waves passing down the tail of a spermatozoon of Psammechinus miliaris . 2. The expression obtained is applicable to waves of relatively large amplitude, and allowance is made for the presence of an inert head. 3. The calculated propulsive speed is almost identical with that derived from observational data. Unless the head of a spermatozoon is very much larger than that of Psammechinus , its presence makes relatively little difference to the propulsive speed. Most of the energy of the cell is used up in overcoming the tangential drag of the tail. 4. Although the amplitude may change as a wave passes along the tail, the propulsive properties of the latter may be expected to be closely similar to those of a tail generating waves of the same average amplitude.