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PNS Visceral Nervous System > CN X (vagus) (para) > Flashcards

CN X (vagus) (para) Flashcards

1
Q

preganglionic cells are located in what nucleus of the vagus nerve?

A

posterior (dorsal) nucleus

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2
Q

fibers descend in the vagus nerve to ultimately supply smooth muscles of what?

A

Smooth muscle of the bronchial tree, digestive tract, gall bladder and bile ducts, myocardium and the pancreas, liver and spleen

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3
Q

Postganglionic cells are usually located in what?

A

organs supplied or blood vessels that supply the organs

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4
Q

what are some abdominopelvic plexuses associated with the postganglionic vagus

A

Myocardium, submucosal plexus and myenteric plexus

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5
Q

what is another name for the submucosal plexus

A

meissners plexus

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6
Q

what is another name for the myenteric plexus

A

auerbachs plexus

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7
Q

when going to the heart preganglionic fibers are carried in what nerves

A

superior and inferior cardiac nerves

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8
Q

when going to the heart preganglionic fibers will synapse in what plexus ate the base of the heart and the wall of the heart

A

cardiac plexus

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9
Q

postganglionic fibers are carried to what structures in the heart

A
  1. sinuatrial node
  2. atrioventrucular node
  3. atrioventricular bundle to reach the subendocardial branches (purkinje fibers)
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10
Q

parasympathetic impulses will inhibit what and constrict what of the heart?

A

inhibit the myocardium and constrict the coronary arteries

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11
Q

going to the lungs preganglionic fibers are carried in what two branches

A

anterior and posterior bronchial branches

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12
Q

preganglionic fibers going to the lung will synapse in what plexuses surrounding the bronchial tree

A

the pulmonary plexuses

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13
Q

postganglionic fibers will reach what structures

A

bronchial musculature and bronchial glands

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14
Q

parasympathetic impulses in regards to the lungs will result in what of the bronchial tree and what of the bronchial glands

A

constriction of the bronchial tree and increase secretion of the bronchial glands

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15
Q

when heading to the esophagus preganglionic fibers are carried in what nerves?

A

recurrent laryngeal nerves as well as the anterior and posterior esophageal branches

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16
Q

preganglionic fibers heading to the esophagus will synapse where?

A

in the wall of the esophagus

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17
Q

postganglionic fibers will the supply what of the esophagus?

A

smooth muscle fibers of the esophagus

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18
Q

the upper 1/3 of the esophagus’ muscular layer is skeletal muscle and is innervated by what?

A

the recurrent laryngeal nerve

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19
Q

when the preganglionic fibers are headed to the stomach by way of what branches?

A

~4 branches from the anterior vagal trunk

~6 branches from the posterior vagal trunks

20
Q

when headed to the stomach preganglionic fibers will synapse in which two plexuses of the wall of the stomach

A

the submucosal (meissner’s) and the myenteric (auerbach’s) plexuses

21
Q

From the plexuses in the wall of the stomach postganglionic axons will reach what?

A

smooth muscle fibers of the stomach

22
Q

in the stomach parasympathetic stimulation results in contraction of what and secretion of what?

A

contraction of smooth muscle of the stomach and secretion of gastric juices

23
Q

Preganglionic fibers will travel to the SI, cecum, vermiform appendix, nd ascending and transverse colon by way of what?

A

posterior vagal trunk

24
Q

Preganglionic fibers reach the duodenum via what?

A

the celiac plexus

25
Q

after innervating the duodenum through the celiac plexus the remaining preganglionic fibers reach their destinations by traveling through which plexuses?

A

the celiac plexus and continuing through the superior mesenteric plexus

26
Q

fibers will synapse where when going to the SI, cecum, vermiform appendix and ascending and descending colon

A

in the submucosal and myenteric plexus

27
Q

postganglionic axons will reach what from the submucosal and myenteric plexuses?

A

smooth muscle fibers

28
Q

parasympathetic stimulation results in what when referring to the SI, cecum, vermiform appendix and ascending and transverse colon

A

contraction of the smooth muscle and it is also secretomotor for intestinal glands

29
Q

visceral afferents of the vermiform appendix are usually what time of receptors

A

nociceptors

30
Q

when heading to the gallbladder, pancreas and biliary tree preganglionic fibers use what nerves

A

hepatic branches and right vagal trunk

31
Q

preganglionic fibers heading to the gall bladder, pancreas and biliary tree reach these structures by way of what plexus?

A

the hepatic plexus

32
Q

the hepatic plexus is an extension of what?

A

celiac plexus

33
Q

preganglionic fibers heading to the gall bladder, pancreas and biliary tree will synapse where?

A

muscular walls of the gall bladder and biliary tree and in the glandular tissue of the pancreas

34
Q

postganglionic fibers reach what of their intended targets when going to the gall bladder, pancreas and biliary tree

A

smooth muscle fibers or glands of their intended target

35
Q

parasympathetic stimulation increases what activity in the gall bladder and biliary tree?

A

increases smooth muscle fibers

36
Q

parasympathetic stimulation is what for the pancreatic glands?

A

it is secretomotor

37
Q

when heading to the spleen preganglionic fibers will travel from what trunk by way of what plexus?

A

posterior vagal trunk by way of the splenic plexus

38
Q

the splenic plexus is an extension of what?

A

the celiac plexus

39
Q

when heading to the kidneys preganglionic fibers reach them through what?

A

through the renal plexus from the posterior vagal trunk

40
Q

the motor supply to the kidneys is strictly what?

A

sympathetic

41
Q

since all motor supply to the kidneys is strictly sympathetic any fibers reaching the kidney via parasympathetic pathway are likely way?

A

visceral afferents

42
Q

where would cell bodies be found referring to the parasympathetic visceral afferents heading to the kidneys?

A

in the inferior ganglion

43
Q

when heading to the liver preganglionic fibers are friarly from what trunk?

A

primarily the anterior vagal trunk, with some from the posterior vagal trunk

44
Q

preganglionic fibers reach the liver via what plexus?

A

the hepatic plexus, an extension of the celiac plexus

45
Q

like the kidneys, parasympathetic supply to the liver is likely what?

A

primarily visceral afferent

46
Q

when heading to the suprarenal glands, similar to the kidneys and liver, vagal supply to the suprarenal glands is what?

A

Primarily visceral afferent

47
Q

visceral afferents heading to the suprarenal glands get there by way of what?

A

Posterior vagal trunk

PNS Visceral Nervous System (7 decks)

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