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Spermatozoa of many species initially respond to hypotonicity as perfect osmometers. Thereafter they undergo a regulatory process resulting in a decrease in cell volume, similar to that reported for somatic cells. Regulatory volume increase (RVI), a complementary process which is assumed to occur following initial shrinkage of sperm volume after exposure to(More)
The ability to maintain cellular volume is an important general physiological function, which is achieved by specific molecular mechanisms. Hypotonically induced swelling results in the opening of K+ and Cl- ion channels, through which these ions exit with accompanying water loss. This process is known as regulatory volume decrease (RVD). The molecular(More)
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