Last Updated
：2025/11/27
electrical polyspermy block
Noun
Japanese Meaning
生物学において、受精時に卵細胞の膜電位が精子との接触により急激に変化し、ナトリウムイオンの流入を伴って多精子受精を防止する機構。
（ plural ）
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(biology) A polyspermy block where the electric potential of an egg rapidly rises from -70mV to +20mV upon contact with sperm due to the influx of sodium ions.
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electrical polyspermy block
During fertilization, the electrical polyspermy block prevents additional sperm entry by rapidly depolarizing the egg from about −70 mV to +20 mV through a sodium ion influx.
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During fertilization, the electrical polyspermy block prevents additional sperm entry by rapidly depolarizing the egg from about −70 mV to +20 mV through a sodium ion influx.
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