Graded potentials are short-lived, local changes in membrane potentials. They can either be depolarizations or hyperpolarizations, and are critical to the generation of action potentials.
•Receptor potentials are graded potentials that occur at the receptor of sensory neurons.
•Post-synaptic potentials (PSP) are graded potentials generated by NT binding to a post-synaptic receptor on a dendrite, neuronal cell body, or even an axon.