Question

for the following descriptive term(s) regarding an aspect of the ans:
first synapse is in the scg (sympathetic chain ganglia)
select whether it is unique to the parasympathetic or sympathetic systems or belongs to both.

both parasympathetic and sympathetic
sympathetic
parasympathetic

Explanation:

The sympathetic nervous system has its first synapse in the sympathetic chain ganglia (SCG). The parasympathetic nervous system has its first synapse in terminal ganglia (near or within target organs), not in SCG. So the "first synapse in SCG" is unique to the sympathetic system.

Answer:

B. sympathetic