Question

most vital organs receive ______ innervation. that is, they receive input from both sympathetic and parasympathetic divisions.
dual
ambitonic
autonomic
single
biaxial

Explanation:

The autonomic nervous system has two divisions: sympathetic and parasympathetic. Most vital organs receive input from both divisions. The term "dual" means two - part. "Ambitonic" is not a relevant term here. "Autonomic" is the system name but does not directly describe the two - part innervation. "Single" is incorrect as it's two divisions. "Biaxial" relates to axes (like in joints) not nerve innervation.

Answer:

A. dual