We have a pre and opposed ganglionic neuron. But there is one exception. The electrical signal that is carried from the spinal cord to our adrenal medulla is carried by only a single neuron, by one pre ganglionic neuron. So the pre ganglionic neuron basically carries that electric signal all the way to our adrenal medulla without using the pose ganglionic neuron. And our neurotransmitter in that case is still acetylcholine. So now let's move on to our parasympathetic nervous system.