PNS - Autonomic Nervous System

Question 1

he PNS consists of ___ pairs of spinal nerves?

Answer 1

43

Question 2

Each spinal nerve attaches to the spinal cord through the________.

Answer 2

ventral/anterior root and a dorsal/posterior root.

Question 3

Dorsal roots have a swelling called the DRG, which stands for _______.

Answer 3

dorsal root ganglion.

Question 4

All spinal nerves are termed mixed nerves because they carry _________.

Answer 4

both motor and sensory fibers.

Question 5

After emerging from the spinal cavity, each spinal nerve splits into a _______.

Answer 5

dorsal ramus and a ventral ramus.

Question 6

The dorsal ramus supplies somatic and sensory fibers to muscles and skin on the posterior surface of the ________.

Answer 6

head, neck, and trunk.

Question 7

Autonomic motor fibers split from the ventral ramus and head toward a ________.

Answer 7

ganglion of the sympathetic chain.

Question 8

Ventral rami of all spinal nerves except T2-T12 form complex networks called ______.

Answer 8

plexuses.

Question 9

Somatic division involves motor neurons serving ________ muscles.

Answer 9

skeletal

Question 10

Voluntary control characterizes the Somatic division, with cell bodies of motor neurons residing in the ______.

Answer 10

CNS.

Question 11

The Autonomic division involves motor neurons serving cardiac muscle, smooth muscle, and _______.

Answer 11

internal glands

Question 12

The Parasympathetic Division is also known as the________ division.

Answer 12

Craniosacral

Question 13

Preganglionic neuron bodies of the Parasympathetic Division are located in brainstem nuclei and _______ levels of the spinal cord

Answer 13

S2-S4

Question 14

Preganglionic axons of the Parasympathetic Division travel in cranial nerves III, VII, IX, X to the immediate area of the head and neck organs, where they synapse with the ganglionic neuron in a ________ ganglion.

Answer 14

terminal

Question 15

n the sacral region, preganglionic axons form the pelvic ______ nerve

Answer 15

splanchnic

Question 16

The Sympathetic Division is also known as the ______ division.

Answer 16

Thoracolumbar

Question 17

Preganglionic neuron bodies of the Sympathetic Division are located in the lateral horns of gray matter of the spinal cord from _____.

Answer 17

T1-L2

Question 18

Preganglionic axons travel through the sympathetic trunk via the _____. ramus communicans.

Answer 18

white

Question 19

The sympathetic trunk ganglion consists of two trunks found alongside the _______.

Answer 19

vertebral column