Gamete Fusion and the Prevention of Polyspermy
Placing unfertilized sea urchin eggs into seawater containing A23187 causes the cortical granule reaction and the elevation of the fertilization envelope. Moreover, this reaction occurs in the …
Fertilization - Molecular Biology of the Cell - NCBI Bookshelf
The Ca 2+ signal activates the egg to undergo the cortical reaction, in which cortical granules release their contents, including enzymes that alter the zona pellucida and thereby prevent the …
28.1 Fertilization – Anatomy & Physiology - Open Educational …
The oocyte’s membrane structure changes in response (cortical reaction), preventing any further penetration by another sperm and forming a fertilization membrane. Fertilization is complete …
Cortical Reaction - an overview | ScienceDirect Topics
The cortical reaction is the first step in a series of biochemical and physical changes in the egg known as egg activation. These rapid changes begin just after fertilization and are …
Gametes and Fertilisation (A Level) — the science sauce
The Cortical Reaction. The fusion of the sperm cell and egg cell membranes triggers the release of calcium ions which stimulates vesicles containing cortical granules to move and fuse with …
The cell biology of fertilization: Gamete attachment and fusion
In human and mice sperm samples, 15–20% of cells undergo spontaneous acrosome reaction (Nakanishi et al., 2001), whereas only 20–30% undergo progesterone-induced acrosome …
14.2: Fertilization - Biology LibreTexts
2022年7月30日 · The oocyte’s membrane structure changes in response (cortical reaction), preventing any further penetration by another sperm and forming a fertilization membrane. …
The biology and dynamics of mammalian cortical granules
2011年11月17日 · Cortical granules are membrane bound organelles located in the cortex of unfertilized oocytes. Following fertilization, cortical granules undergo exocytosis to release …
Polyspermy prevention: facts and artifacts? - PMC - PubMed …
The cortical reaction is a slow structural change that changes the receptive outer investment of the oocyte into a hardened protective layer for the developing embryo. Timing of fertilization in …
Cortical reaction - bionity.com
The cortical reaction, also known as the zona reaction, occurs when a sperm unites with the egg's plasma membrane, altering the zona pellucida which prevents other sperm from binding to and …
- 某些结果已被删除
跳至内容