Answer & explanation:
Receptor-mediated endocytosis is similar to phagocytosis, but in this case the particle to be endocyted binds to specific receptor proteins concentrated at certain plasma membrane sites. These sites form a small depression in the plasma membrane that is covered by a fibrous protein. the clathrin.
When one of the receptor proteins binds to a specific macromolecule to which it is specific, the depression spreads and forms a vesicle.
Clathrin (the protein responsible for vesicle formation within eukaryotic cells) acts as a mediator, ensuring stability to the vesicle that is transported within the cell. In the cytoplasm, the vesicle loses its clathrin cover and may fuse with lysosomes to process the digestion of the particles.
Given the specificity of receptor proteins for certain macromolecules, this type of mediated endocytosis tends to be faster and more efficient for substance transport.
