The Nursing Student Is Preparing a Presentation for the Class

The nursing student is preparing a presentation for the class on the relationship of ligands to receptors. Which explanation should the student include in the presentation?

A) "The drug ligand works like a key that fits into a lock, which is the receptor protein in the neuron."
B) "The drug ligand is the door that opens into the house, which is the neuron."
C) "The receptor protein is like a flame that ignites the stove, which is the drug ligand."
D) "The drug ligand works like a comforter, providing a protective cover for the receptor protein."