The paravertebral ganglia are the site of synapses between most pre- and postganglionic neurons of the division of the autonomic nervous system.

Question: The paravertebral ganglia are the site of synapses between most pre- and postganglionic neurons of the division of the autonomic nervous system.

Yes, the paravertebral ganglia are the site of synapses between most pre- and postganglionic neurons of the sympathetic division of the autonomic nervous system.

The sympathetic division is responsible for the "fight or flight" response, which prepares the body for physical activity or danger. It does this by increasing heart rate, blood pressure, breathing rate, and blood flow to the muscles.

The paravertebral ganglia are located on either side of the spinal column. They are connected to the spinal cord by preganglionic neurons, and they send postganglionic neurons to organs and tissues throughout the body.

When a preganglionic neuron arrives at a paravertebral ganglion, it releases the neurotransmitter acetylcholine. This binds to receptors on the postganglionic neurons, causing them to fire. The postganglionic neurons then release the neurotransmitter norepinephrine to their target organs and tissues.

Norepinephrine has a number of effects on the body, including:

Increasing heart rate and blood pressure
Dilating the pupils
Increasing blood flow to the muscles
Decreasing blood flow to the digestive system
Inhibiting bladder contractions

The paravertebral ganglia play an important role in regulating a number of bodily functions, including heart rate, blood pressure, breathing rate, and digestion. They are also essential for the "fight or flight" response.