The sympathetic nervous system
A) is called the thoracolumbar system
B) releases norepinephrine from its preganglionic axon
C) is called the craniosacral system
D) both a and b above

Question

Quizplus · Accepted Answer

The sympathetic nervous system is referred to as the thoracolumbar system because its preganglionic neurons originate from the thoracic and lumbar regions of the spinal cord.

Answer: B
 The sympathetic nervous system releases norepinephrine from its preganglionic axon, which then acts on postganglionic neurons or directly on target organs.

Therefore, the answer is D: both a and b above.

The Sympathetic Nervous System