Send to:

Choose Destination
See comment in PubMed Commons below
Biophys J. 1980 Feb;29(2):295-303.

Motion characteristics of flagellar fragments of long insect sperm.


The flagellar length of cricket spermatozoa was reduced in steps from congruent to 1,000 micrometer (intact length) to 50 micrometer. In intact sperm the flagellar wave properties were largely independent of the viscosity of the external medium. When the flagellar length had been reduced to less than 100 micrometer the flagellar frequency was reduced at a raised external viscosity. Independent motion of different sections of a flagellum was not observed when its length is less than 100 micrometer. It is concluded that in long thin flagella, transverse viscous forces cannot exert a moment beyond a lever length of approximately 100 micrometer. It is shown that the existence of a maximum lever length, beyond which no moment can be transmitted, leads to the absence of a standing active contractile moment in the long insect sperm.

[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Write to the Help Desk