Chapter 14, Problem 1RFT

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

ventral root …………………………...

Summary Introduction

To review:

Match the term ventral root with the most closely related description given below:

Tracts and columns

Specific region of body surface

Cervical plexus

Motor neuron axons

Sacral plexus

Lumbar plexus

Single bundle of axons

Involuntary motor response

Loose connective tissue, adipose tissue

Pectoral girdle/upper extremity

Introduction:

Spinal cord and brain are a part of the central nervous system (CNS). The spinal cord is divided into 31 sections, each of the sections are having a pair of dorsal and ventral roots; and dorsal root ganglia. When the motor neuron is activated, the action potential travels via the ventral root to the effector organs.

Explanation of Solution

The ventral root is also known as the anterior root. It is able to control the peripheral effectors via the visceral motor neurons. The ventral root consists of the axons of motor neurons. A dorsal and ventral root combines to give rise to the spinal nerve that goes through the intervertebral opening. The ventral roots are thinner than the dorsal roots.

Conclusion

Therefore, it can be concluded that the term ventral root can be correctly matched with option (d) motor neuron axons.