Here's why:
* Postganglionic neurons: These neurons are part of the autonomic nervous system, specifically the sympathetic branch. They transmit signals from the sympathetic ganglia to target organs.
* Modified postganglionic neurons: In the adrenal medulla, these neurons are specialized and called chromaffin cells. They lack the typical dendrites and axons found in other neurons.
* Function: Instead of directly innervating target organs, chromaffin cells release hormones directly into the bloodstream. These hormones, epinephrine (adrenaline) and norepinephrine, are part of the body's "fight or flight" response.
Therefore, the adrenal medulla is a unique organ containing modified postganglionic neurons that act as endocrine cells rather than typical neurons.
