Define: adequate stimulus, threshold, and modality.
- adequate stimulus-a receptor has a particular form of energy that is most responsive to, but it will respond to others
- threshold-the minimum stimulus required to activate an action potential, depolarizing it.
- modality-the ability of the CNS to distinguish where a neuron starts, ends, intensity, and duration
- -receptor types have are more sensitive to particular modality of stimulus
- 1:1 receptor to sensation