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Nitric oxide is an important gaseous molecule involved in vascular and neural function. Nitric oxide causes blood vessels to dilate. Endothelial cells line blood vessels. Glutamate activity in the brain releases nitric oxide. Glutamate is the main excitatory neurotransmitter in brain function.

From this information, which ONE of the following statements can be logically deduced?


Endothelial cells secretes substances that modulate neural function.


Neural activity leads to an increase in localized brain vascular blood flow.


Nitric oxide stimulates both blood vessels and neurons.


Nitric oxide is not utilized in the peripheral nervous system.


Nitric oxide reaches neurons via the brain ventricles and venous sinuses.

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