76 results found
    1. Evolutionary Biology

    Sperm competition risk drives rapid ejaculate adjustments mediated by seminal fluid

    Michael J Bartlett et al.
    Seminal fluid harbours the as yet unknown mechanism that facilitates rapid adjustment of sperm velocity in response to changing sperm competition risk.
    1. Developmental Biology
    2. Physics of Living Systems

    Rolling controls sperm navigation in response to the dynamic rheological properties of the environment

    Meisam Zaferani et al.
    Rheological properties of the environment regulate sperm swimming and navigational behavior through suppression or reactivation of sperm rolling around its longitudinal axis.
    1. Cell Biology
    2. Physics of Living Systems

    Flagellar energetics from high-resolution imaging of beating patterns in tethered mouse sperm

    Ashwin Nandagiri et al.
    Calculations of flagellar energetics from beating patterns in sperm reveal that internal dissipation by dynein motors and other passive structures within the flagellum significantly exceeds external hydrodynamic dissipation.
    1. Evolutionary Biology

    Sperm competition: The need for speed

    Tom Pizzari
    A change in social status can quickly lead to a change in the quality of the seminal fluid produced by a male Chinook salmon as he responds to increased reproductive competition from higher-status males.
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    1. Cell Biology

    COMP-1 promotes competitive advantage of nematode sperm

    Jody M Hansen et al.
    Nematode sperm respond to competitive environments by modulating cellular pathways involved in migration and storage to ensure their access to oocytes.
    1. Physics of Living Systems
    2. Cell Biology

    Cortical flow aligns actin filaments to form a furrow

    Anne-Cecile Reymann et al.
    Compressing the actomyosin network by cortical flow causes filaments to align and form a constricting ring.
    1. Physics of Living Systems

    Rheotaxis facilitates upstream navigation of mammalian sperm cells

    Vasily Kantsler et al.
    Mammalian sperm subject to shear flow swim in upstream spirals along the walls bounding such flows, thereby demonstrating a robust mechanism for upstream navigation to the ovum.
    1. Cell Biology
    2. Computational and Systems Biology

    A positive-feedback-based mechanism for constriction rate acceleration during cytokinesis in Caenorhabditis elegans

    Renat N Khaliullin et al.
    Positive feedback between contractile ring myosin and compression-driven cortical flow can explain the exponential accumulation of contractile ring components and constriction rate acceleration that ensures timely cell separation during cytokinesis.
    1. Cell Biology

    Nanobody-directed targeting of optogenetic tools to study signaling in the primary cilium

    Jan N Hansen et al.
    Trafficking of optogenetic tools to primary cilia using nanobodies allows to study cAMP signaling with spatial and temporal resolution independent of the cell body.
    1. Physics of Living Systems

    Sperm chemotaxis is driven by the slope of the chemoattractant concentration field

    Héctor Vicente Ramírez-Gómez et al.
    The slope of the chemoattractant concentration gradient is a driving force for sperm chemotaxis, by coordinating the entrainment of information flow between sensing, signaling and motility.

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