12 Autonomic Nervous System

Question 1

Ganglion impar

Answer 1

Two sympathetic trunks join as ganglion impar at coccyx

Question 2

Postganglionic sympathetic fibers

Answer 2

travelling to thoracic organs, neck, head

Question 3

preganglionic sympathetic fibers

Answer 3

travel to trunk but not synapse -> provide sympathetic innervation to the organs of abdomen and pelvis

Question 4

preganglionic neurotransmitter

Answer 4

acetylcholine

Question 5

postganglionic neurotransmitter

Answer 5

norepinephrineto sweat glands is cholinergic using acetylcholine as a neurotransmitter

Question 6

ascending and descending path

Answer 6

ascend and descend so that sympathetic fibers from the lateral horn can reach an appropriate level, synapse and be distributed with each of the 31 pairs of spinal nerves.

Question 7

thoracic organs path

Answer 7

ascent to appropriate level, synapse, no grey ramus, leave trunk to form splanchnic nerve that supply thoracic organs

Question 8

the great splanchnic nerve

Answer 8

supply celiac ganglia, supply forgut

Question 9

lesser splanchnic nerve

Answer 9

synapse in aorticorenal ganglia, supply kidney

Question 10

lumbar splanchnic nerves

Answer 10

synapse in inferior mesenteric ganglion and supply hindgut

Question 11

collaterals from celiac ganglion

Answer 11

enter superior mesenteric ganglion, supply midgut

Question 12

abdominal organs path

Answer 12

exit the trunk without synapsing, terminate after forming greater, lesser, splanchnic, lumbar, these ganglia are called prevertebral and postganglionic sympathetic fibers from these ganglia are distributed to abdominal organs.

Question 13

parasympathetic organization

Answer 13

craniosacralcranial - carrying pregang neurons that originate in brainCN10 vagus - all thoracic organsSacral - originates in S2-4 spinal cordEX)pelvic splanchnic nn - energetic nerves that control repro, sexual (nervi erigens)neurotransmitter - acetylcholine for both pre and post

Question 14

eyes

Answer 14

parasympathetic - light responsesympathetic - dark response

Question 15

sex organs

Answer 15

parasympathetic - erectionsymp - ejaculation

Question 16

referred pain

Answer 16

paint from viscera is referred to the body wall. paint from visceral afferent ca be referred to somatic afferents that enter the same level of the spinal cord and have their cell bodies in the same dorsal root ganglia as the visceral afferents.

Question 17

Pudendal

Answer 17

Somatic n. Because it supplies skeletal muscle (s2,s3,s4)

Question 18

Vagus cn10

Answer 18

Terminal ganglia in gut wall