Final answer:
Neuroglia do not release neurotransmitters; this function is specific to neurons. Glial cells provide supportive framework, regulate extracellular fluid and secrete cerebrospinal fluid (CSF), but neurotransmitter release is not one of their functions.
Step-by-step explanation:
Neuroglia, or glial cells, perform a variety of functions in the nervous system that support and maintain the health of neurons. However, there is an exception to the functions they are known to perform. When presented with the statement 'Neuroglia perform all of these functions EXCEPT', the correct choice is:
a. release neurotransmitters
Neuroglia have critical roles such as:
- Provide a supportive framework for neurons in the nervous system.
- Regulate extracellular fluid composition by managing ion concentrations and taking up neurotransmitters.
- Secrete cerebrospinal fluid (CSF), in the case of ependymal cells, which cushions the central nervous system and circulates nutrients.
However, the release of neurotransmitters is a function specific to neurons, which actively participate in synaptic transmission by releasing neurotransmitters into the synaptic cleft. Unlike neurons, neuroglia do not conduct electrical impulses and do not release neurotransmitters.