Final answer:
Voltage-regulated channels are located in the cell membranes of dendrites, axons, and neuron cell bodies, playing an integral role in neuronal signal transmission.
Step-by-step explanation:
Voltage-regulated channels are critical components in neuron function, found within the neuronal cell membranes. These channels play a critical role in regulating the movement of ions into and out of a neuron, which is essential for generating and conducting electrical signals. When a neuron receives a stimulus, voltage changes across its membrane, causing the opening or closing of voltage-gated channels and allowing ions to flow.
These channels are sensitive to changes in electrical potential across the membrane, responding with a change in their conformation that allows for the selective passage of ions. The correct answer to the question is E) all of the above, as voltage-regulated channels can be found in the membranes of dendrites, axons, and the neuron cell body, all of which are involved in the propagation of electrical signals in neurons.