These 'message conducting' cells have some very special characteristics that make them easy to distinguish from other cell types: First of all, they have an exceptionally high function more than a few minutes without a constarit supply of ghucose or oxygen. Secondly, this cell type is means it does not have the ability to repair or replace damaged or dying cells. And finally, these cells are put together well.. compared to most other cells in the body, they have an extreme cannot nutrition.

- The passage describes cells specialized for transmitting signals, which are known as neurons. - Neurons have a very high metabolic demand. In fact, they require a constant supply of glucose and oxygen because even a brief interruption (a few minutes) can be detrimental to their function. This can be expressed as: \[ \text{Neuronal function} \propto \text{(constant glucose and oxygen supply)} \] - Unlike many other cell types, neurons have little to no ability to repair or replace themselves after damage. They are essentially non-dividing cells in the adult central nervous system. - Neurons are also characterized by their highly organized connectivity. This precise organization is crucial for the proper transmission of messages throughout the nervous system. - In summary, the key features are: 1. A very high metabolic rate needing constant energy (glucose and oxygen). 2. Minimal regenerative capacity. 3. A highly ordered structure that supports efficient message conduction.