transport a signal through the lipid bilayer

relay a signal from the outside to the inside of the cell

relay message from the inside of the mebrane throughout the cytoplasm

dampen the message

White blood cells bumping into each other sharing antigen info

Neurons communicating across a synapse

Hormones traveling through the blood stream to target tissues

White blood cells bumping into each other sharing antigen info

Neurons communicating across a synapse

Hormones traveling through the blood stream to target tissues

Amplification of the signal molecule

Enzymatic proteins inhibiting process of the signal transduction pathway

Kinase groups adding dimer groups to other enzymes

Diffusion of molecules within the cell due to the signaling molecule

All ligands are proteins.

Each ligand is only able to bind to one specific receptor

Ligands can bind to cell-surface receptors, but they cannot enter the cell

Ligands bond to receptor proteins and cause the protein to relay a message to intracellular proteins.