One way that cells can increase their Responsiveness to an external chemical regulator

One way that cells can increase their responsiveness to an external chemical regulator is by Multiple Choice increasing the number of their transmembrane receptors by endocytosis. mutating their extracellular receptors so that the affinity for the chemical regulator is reduced. decreasing the number of their transmembrane receptors by endocytosis. uncoupling their receptors from the second message generator. increasing the number of their transmembrane receptors by fusion of intracellular vesicles to the membrane.