In the slow block to polyspermy, sperm penetration releases an inflow of Ca2+, which in turn stimulates the cortical reaction.
<h3>What do you understand by the cortical reaction?</h3>
A mechanism known as the cortical reaction, which is started after fertilization, stops polyspermy, or the union of several sperm with one egg. The cortical reaction occurs in two stages: the creation of the jelly layer and the dissolution of the cortical crypt, followed by the modification of the vitelline envelope into the thick fertilization envelope by the cortical vesicle reaction. The zona pellucida becomes resistant to sperm attachment and penetration after sperm and egg fusion because the contents of cortical granules (CG), a type of specific organelle in the egg, leak into the perivitelline area (cortical response).
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its the circulatory system
The process of __clonal selection__
Answer:
its a noun
the semipermeable membrane surrounding the cytoplasm of a cell.
Answer:
Tertiary structure is formed by the folding of the secondary structure sheets or helices into one another. The tertiary structure of protein is the geometric shape of the protein. It usually has a polypeptide chain as a backbone, with one or more secondary structures. The tertiary structure is determined by the interactions and bonding of the amino acid side chains in the protein.
Tertiary structure is formed by the folding of the secondary structure sheets or helices into one another. The tertiary structure of protein is the geometric shape of the protein. It usually has a polypeptide chain as a backbone, with one or more secondary structures. The tertiary structure is determined by the interactions and bonding of the amino acid side chains in the protein.Quaternary structure results from folded amino-acid chains in tertiary structures interacting further with each other to give rise to a functional protein such as hemoglobin or DNA polymerase.