Chapter 15.7, Problem 25LO

Summary Introduction

To describe: The systems that are innervated only by the sympathetic division and the way they function.

Concept introduction: The sympathetic nervous system is often referred to as fight-or-fight division. The preganglionic neuron of the sympathetic system is originated from the thoracic and lumbar regions of the spinal cord. The postganglionic neuron of the sympathetic system is originated from the sympathetic ganglion chain or collateral ganglia. The sympathetic nervous system activates the body for an emergency situation, largely through the release of norepinephrine from the postganglionic fibers, and the secretion of epinephrine and dopamine from the adrenal medulla.