Radioligands either remain within the blood stream or enter the brain and bind to receptors.

For example, in a higher dose, a specific drug molecule may also bind to other receptors than those said to be "selective".

These neurotransmitters then bind to receptors on the postsynaptic cell.

So scientists can test thousands of substances to see which bind to receptors associated with a particular disease.

They bind to nuclear receptors in the cell nucleus for genomic actions.

This protein binds to several receptors on the surface of skeletal muscle.

I find nothing unclear about "All molecules which are drugs bind to receptors."

Hormones act by binding to specific receptors in the target organ.

Cetuximab binds to such receptors and turns off that signal.

Ligands bind to receptors and dissociate from them according to the law of mass action.