How does sperm know exactly where to go for fertilization?
I mean they have to travel so much, so how do they all know where to go? I think it's pretty interesting. Yeah, I'm a nerd, so what. But seriously how do they know where to find the egg?
They don't. They actually go in all directions. However, since there is only "upstream" and "downstream" roughly half will go the right way and then half again will end up in the correct Fallopian tube to find the egg. In some circles, this is called the "shotgun effect" and is exactly why there are millions instead of just one as women release eggs from their ovaries.
So sperm are almost as clueless as the impregnators.
Next, how does it power its swim? We are not as good as bacteria with their "irreducibly complex flagellum."
This gradual process takes 20–30 minutes. In this time, fibrinogen from the seminal vesicles forms a clot, securing and protecting the sperm. Just as they become hypermotile, fibrinolysin from the prostate dissolves the clot, allowing the sperm to progress optimally.
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How does sperm know exactly where to go for fertilization?
I mean they have to travel so much, so how do they all know where to go? I think it's pretty interesting. Yeah, I'm a nerd, so what. But seriously how do they know where to find the egg?
They don't. They actually go in all directions. However, since there is only "upstream" and "downstream" roughly half will go the right way and then half again will end up in the correct Fallopian tube to find the egg. In some circles, this is called the "shotgun effect" and is exactly why there are millions instead of just one as women release eggs from their ovaries.
So sperm are almost as clueless as the impregnators.
Next, how does it power its swim? We are not as good as bacteria with their "irreducibly complex flagellum."
I would disagree with the response there.
If you look at pictures of eggs being fertilised, it's perfectly obvious that the egg is attracting the sperm.
You get millions of sperm all trying to break into the egg, rather than going in random directions.
I believe I read that they react to chemicals given off by the fertile egg. I'm pretty sure that this would give a rough directional guide to the sperm.
While there is a market for shit, there will be assholes to supply it.
Mm, yes true. Not sure at what range the detect the egg. Chemicals are involved.
We had a professor making moth pheromones. When they upped the dose, finally no moths came. In their excitement, they had flapped their wings off a mile away.
Tero wrote:Mm, yes true. Not sure at what range the detect the egg. Chemicals are involved.
We had a professor making moth pheromones. When they upped the dose, finally no moths came. In their excitement, they had flapped their wings off a mile away.
I'm not surprised.
They aren't programmed to understand concentrations over a certain level.
It's quite possible that once they detect a certain concentration level, they assume that they are in contact with a female, and just go into automatic mating mode. That could easily happen a mile away, if you were synthesising the stuff.
While there is a market for shit, there will be assholes to supply it.
