Amazing stuff! Fascinating! Articles comes with video!
We still do not even understand how a sperm finds an egg in mammals, but we are told that that the planet is doomed when temperatures increase by 2 degrees Celsius by the Global Warming hoax and Climate Change religion demagoguery. Climate is much more complex than fertilization!
"A new study reveals how sperm change their swimming patterns to navigate to the egg, shifting from a symmetrical motion that moves the sperm in a straight path to an asymmetrical one that promotes more circular swimming.
This change in behavior, called hyperactivation, enables the sperm to sweep the area once in the egg’s proximity, which improves the sperm’s chances of finding it.
For the in vitro study, the researchers designed microfluidic chips with micron-sized channels so they could observe bovine sperm with a microscope and a high-speed camera. ..."
For the in vitro study, the researchers designed microfluidic chips with micron-sized channels so they could observe bovine sperm with a microscope and a high-speed camera. ..."
Full abstract:
"Mammalian sperm migration within the female reproductive tract requires navigational mechanisms, through which sperm respond to biophysical and biochemical cues. Previous studies revealed that biophysical cues for sperm in the female reproductive tract include fluid flow, wall architecture, and temperature gradients. Here, by exploring bovine sperm motion in microfluidic reservoirs and by developing theoretical and computational models, we demonstrate that sperm motility hyperactivation, which is part of a process that prepares sperm in the female tract for fertilization and involves an increase in the asymmetry of sperm flagellar beating, modulates sperm–sidewall interactions and thus navigation via female tract wall architecture. Specifically, hyperactivation reduces the tendency of sperm to remain swimming along walls and promotes a response that resembles chemotaxis."
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