The page explores detailed cell signaling processes starting at the cell membrane and moving to intracellular components like the nucleus, examining the structural features and functions of cell membr...The page explores detailed cell signaling processes starting at the cell membrane and moving to intracellular components like the nucleus, examining the structural features and functions of cell membrane receptors. It focuses on different receptor classes, including GPCRs and receptor tyrosine kinases, elaborating on their roles in signal transduction, receptor activation mechanisms, and downstream signaling pathways.