3. Adaptation The sensory receptor adapt to any constant stimulus after a period of mulus Stimulus time Phasic receptors quickly adapt Most exteroceptors Tonic receptors adap p slowly or not at all potentials Most visceroceptors3. Adaptation The sensory receptor adapt to any constant stimulus after a period of time Phasic receptors quickly adapt. Most exteroceptors Tonic receptors adapt slowly or not at all. Most visceroceptors