The series of molecular signals initiated by an extracellular ligand binding to a receptor located on the cell surface. The pathway ends with regulation of a downstream cellular process, e.g. transcription.
chloroplast-nucleus signaling pathway
dopamine receptor signaling pathway +
endoplasmic reticulum unfolded protein response +
ER-nucleus signaling pathway +
extracellular ATP signaling
G protein-coupled receptor signaling pathway +
granzyme-mediated programmed cell death signaling pathway +