Cell Sensitivity to an External Signal is Determined By

Question

Cell sensitivity to an external signal is determined by:
A)kₒn.
B)kₒff.
C)Kd.
D)the number of surface receptors.

Accepted Answer

The number of surface receptors determines a cell's sensitivity to an external signal. The more surface receptors a cell has, the more likely it is to bind to the external signal and respond to it. The other options, kₒn, kₒff, and Kd, are all parameters that affect the binding kinetics of a receptor-ligand interaction, but they do not directly determine the cell's sensitivity to the signal.