Cells that respond to ligands

A) possess receptor sites for specific ligands.
B) generally produce the ligands.
C) have lysosomes that destroy the ligands.
D) are using electrical signals in cellular communication.
E) are not functional.

Receptor Sites

Specific locations on a cell surface or within a cell that are designed to bind with particular substances like hormones, neurotransmitters, or drugs.

Ligands

Molecules that bind to other (usually larger) molecules, often to signal or trigger a biochemical response.