Lecture 18: Autonomic Nervous System

Question 1

Sympathetic originates from spinal cord levels

Answer 1

T1-L2

Question 2

Parasympathetic originates from

Answer 2

Cranial nerves 3, 7, 9, 10 and S2-4

Question 3

Preganglionic neuron

Answer 3

Always myelinated
Synapse with postganglionic neurons
Utilize acetylcholine

Question 4

Postganglionic neuron

Answer 4

Originates from ganglion
Never myelinated
Generally utilizes norepinepherine

Question 5

Parasympathetic nerve synapse where and function

Answer 5

Synapse on microscopic ganglion cells in walls of target organs
Responsible for maintaining and coordinating gut function

Question 6

Sympathetic nerves synapse where and function

Answer 6

Synapse on cells in large ganglia located in dorsal wall of coelom
Involved in responses related to anger, fear, anxiety
(close sphincters, constrict blood flow to gut, etc..)

Question 7

Thoracic sympathetic chain

Answer 7

Includes cervical ganglia

12 thoracic ganglia pairs referred to as stellate ganglion

Question 8

Preganglionic sympathetic supply to thoracic viscera are from

Answer 8

T1-T5

Question 9

Postganglionic sympathetic supply to thoracic viscera are

Answer 9

Cervical ganglia

T1-T5 paravertebral ganglia

Question 10

Greater splanchnic nerve synapses where

Answer 10

Celiac ganglion

Question 11

Lesser splanchnic nerve synapses where

Answer 11

Aorticorenal ganglion

Question 12

Least splanchnic nerve synapses

Answer 12

Superior mesenteric ganglion

Question 13

Lumbar splanchnic nerve synapses

Answer 13

Inferior mesenteric ganglion

Question 14

Splanchnic nerves supply

Answer 14

Abdominal viscera

Question 15

Vagus nerve (CN X) supplys

Answer 15

Thoracic and abdominal viscera

Question 16

Vagus nerve becomes the

Answer 16

Gastric nerve