How could the adrenal gland release neurotransmitters when it isn't part of the nervous system?

Wrong: Hi. The adrenal gland has two district functional components: the cortex which makes steroid hormones and the medulla which secretes the "neurotransmitters" (but hormones in this context) epinephrine, norepinephrine, and dopamine. The adrenal medulla IS part of the nervous system, and is the equivalent of a presynaptic neuron; release is to blood instead of a postsynaptic nerve or muscle cell.