Questions about learning the Japanese language should go to /r/LearnJapanese. Requests for candy, etc from Japan should go to /r/snackexchange. Requests for assistance in purchasing things from Japan will be removed. Please search for proxy buyers/shipping services on Google.
endocrine signaling. Signaling in which endocrine cells release hormones that act on distant target cells.
A receptor could be an area or multiple areas on the outside of a cell, must likely a Eukaryote cell. When another organism sends a chemical signal to the cell the signal would be picked up by the receptor. A receptor could start a signal transduction or could cause endocytosis to occur. I'm going to give you two definitions to choose from.. 'Its a protein that allows signal molecules to attach to it.