Anandamide | physiology | Britannica (original) (raw)

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sperm

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  In sperm
  …of a substance known as anandamide, which is thought to occur in high concentrations near the egg. Upon reaching an egg, enzymes contained within the sperm acrosome are activated, enabling the sperm to traverse the thick coat surrounding the egg (the zona pellucida); this process is known as the acrosome…
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