Just before fertilization is about to occur, what the sperm must release to prevent competing sperm from reaching the egg nucleus at the same time?

Explanation

The corona radiata is a layer of cells surrounding the egg in the ovary and the fallopian tube. Sperm must penetrate this layer to reach the egg for fertilization. Sperm do release certain chemicals to help break through this layer, but "control of the corona radiata from the sperm head" isn't a typical way to describe this process. Hyaluronidase is an enzyme that helps break down the hyaluronic acid present in the tissues surrounding the egg. This allows the sperm to penetrate through these tissues more easily, facilitating fertilization. Proteolytic enzymes are enzymes that break down proteins. Sperm release these enzymes to help break down the protective layers surrounding the egg, such as the zona pellucida, allowing the sperm to reach and fertilize the egg.