What is an extracellular domain?
A) Region of a cell-surface receptor that is located on the cell surface
B) Receptor protein that is located in the cytosol of a cell and binds to ligands that pass through the plasma membrane
C) Protein integrated into the membrane structure that interacts extensively with the membrane lipids' hydrocarbon chains and often spans the membrane
D) Cell-surface receptor that activates membrane-bound G-proteins to transmit a signal from the receptor to nearby membrane components