Answer:
Cell signaling involves three stages that are reception of signal molecules by the cell surface receptor, transduction of that signal molecules and response of the signal molecule.
Reception: In reception, the items that are involved are receptor molecules and cell surface receptors like G- protein-coupled receptors, receptor tyrosine kinase, enzyme-linked receptors.
Transduction: In transduction, the items involved are adenylyl cyclase, phosphorylation cascade, second messenger like cAMP, DAG and IP3.
Response: The response of cell signaling is the starting of molecular processes and the production of proteins.