What does the choroid plexus produce?

The choroid plexus is a specialized structure located in the ventricles of the brain that plays a crucial role in the production of cerebrospinal fluid (CSF). This fluid is essential for various functions, including cushioning the brain, maintaining intracranial pressure, and facilitating the exchange of nutrients and waste products between the brain and its surrounding environment.

The cells of the choroid plexus are ependymal cells that actively transport ions and other substances to create CSF from blood plasma. This process is vital for maintaining the brain's homeostasis and protecting it from injury.

In contrast, neurotransmitters are chemical messengers involved in synaptic transmission, endorphins are hormones that act as natural pain relievers, and myelin is a fatty substance that insulates nerve fibers to enhance the speed of electrical impulses along neurons. None of these functions are associated with the choroid plexus.