The Number of Bound Receptors on a Target Cell Depends

Question

The number of bound receptors on a target cell depends on what two things?
A) the concentration of the messenger and the distance it has to travel
B) the type and concentration of receptors
C) the concentration of the messenger and signal transduction
D) the secretory cell and target cell
E) the concentration of the messenger and the concentration of receptors on the target cell

Accepted Answer

The number of bound receptors on a target cell primarily depends on the concentration of the messenger (ligand) in the vicinity of the target cell and the concentration of available receptors on the target cell. Higher concentrations of either increase the likelihood of receptor-ligand binding events.