L18: Autonomic Nervous System

Question 1

divisions of the ANS

Answer 1

1. sympathetic T1-L2
2. parasympathetic
   CN3,7,9,10, S2-4

Question 2

sympathetic nerves respond to

Answer 2

anger, fear, anxiety

Question 3

sympathetic nerves inhibit

Answer 3

digestion
secretion
close involuntary sphincters
constrict blood flow to guts

Question 4

parasympathetic nerves are responsible for maintaining and coordinating ?

Answer 4

gut functions

secretion of fluids
gut contractions

Question 5

ANS innervation is entirely ?

Answer 5

motor

Question 6

2 neuron pathways

Answer 6

preganglionic

postganglionic

Question 7

preganglionic neurons

Answer 7

always myelinated
synapse w/ postganglionic
ACH
originate on spinal cord

Question 8

post-ganglionic neurons

Answer 8

originates from ganglion
never myelinated
norepinephrine

Question 9

splanchnic nerves are composed of _____ fibers and ____ fibers.

Answer 9

preganglionic fibers

visceral sensory fibers

Question 10

splanchnic nerves supply _____ and synapse ?

Answer 10

abdominal viscera

synapse in prevertebral ganglion

Question 11

CN X

Answer 11

vagus nerve

Question 12

the major parasympathetic supply to thoracic and abdominal viscera

Answer 12

vagus nerve

Question 13

vagus nerve relative to esophagus

Answer 13

parallel to it

innervates it

Question 14

the left vagus becomes

Answer 14

anterior vagal trunk

Question 15

right vagus becomes

Answer 15

posterior vagal trunk

Question 16

vagus nerves pass ____ to root of lungs on both sides

Answer 16

posteriorly

Question 17

_____ nerve pierces diaphragm w/ the _____ .

Answer 17

vagus nerve

esophagus

Question 18

after the ____ nerve pierces the diaphragm, it becomes the ____ nerve.

Answer 18

vagus nerve

gastric nerve

Question 19

branches of the splanchnic nerve

Answer 19

greater
lesser
least splanchnic

Question 20

branches of the vagus nerve

Answer 20

1. cardiac branches
2. pulmonary branches
3. esophageal branches
4. left recurrent laryngeal
5. right recurrent laryngeal

Question 21

cardiac branches

Answer 21

off vagus nerve

to cardiac plexus

Question 22

pulmonary branches

Answer 22

off vagus nerve

to pulmonary plexus

Question 23

esophageal branches

Answer 23

off vagus nerve

to esophageal plexus

Question 24

left recurrent laryngeal nerve

Answer 24

off left vagus n.

hooks around arc of aorta to left of ligamentum arteriosum

Question 25

right recuurent laryngeal nerve

Answer 25

off right vagus n.

hooks around subclavian art.

thus arises in neck not thorax