Chapter 17, Problem 1RFT

Match each numbered item with the most closely related lettered item.

preganglionic......................................

Summary Introduction

To review:

Match the term preganglionic with the most closely related description given below:

All preganglionic fibers

Preganglionic fibers to collateral ganglia

First neuron

Collateral ganglia

Adrenal medulla

Sympathetic activation

Sympathetic division

Terminal ganglia

Sympathetic chain ganglia

Long postganglionic fiber

Introduction:

The preganglionic neurons in the sacral segments of the spinal cord and in the brainstem and the ganglionic neurons in the peripheral ganglia present inside or immediately next to the target organs are the components of parasympathetic division.

Explanation of Solution

The preganglionic neurons are the first neurons. They have their cell bodies in the central nervous system and axons project to the ganglia in the peripheral nervous system. The preganglionic neurons form the synapses with the ganglionic neurons in the sympathetic trunk and release ACh (acetylcholine), which always have the excitatory effects.

Conclusion

Therefore, it can be concluded that the term preganglionic can be correctly matched with option (c) first neuron.