Autonomic Nervous System 2

Question 1

d-tubocurarine

Answer 1

N1 (nicotinic acetylcholine) receptor antagonist. affects somatic nervous system.

Question 2

nicotine

Answer 2

nicotinic receptor agonist. affects somatic nervous system.

Question 3

hexamethonium

Answer 3

N2 receptor antagonist. affects both parasympathetic and sympathetic divisions

Question 4

atrophine

Answer 4

muscarinic cholinergic receptor antagonist. affects parasympathetic divisions.

Question 5

Parasympathetic activation produces the following effects

Answer 5

pupillary constriction/miosis, copious secretion of glands, GI peristalsis, bronchial constriction, decreased heart rate

Question 6

Vagus Nerve (CN 10)

Answer 6

heart, lungs, liver and gallbladder, spleen, tomach, pancreas, small intestine

Question 7

nuclei of the vagus nerve

Answer 7

dorsal motor nucleus of vagus, nucleus ambiguus

contain cell bodies of preganglionic fibers

Question 8

myenteric plexus

Answer 8

mainly controls motility

Question 9

submucosal

Answer 9

mainly controls secretions

Question 10

cutting parasympathetic fibers innervating the gut results in

Answer 10

decrease in GI wall muscle and increase sphincter tone

Question 11

stimulation from the parasympathetic nerves

Answer 11

enhances motility and secretions through the enteric nervous system

Question 12

stimulation from the sympathetic nerves

Answer 12

reduces motility and secretions through the enteric nervous system

Question 13

during filling of the bladder _____ control predominates

Answer 13

sympathetic; causing relaxation of the detrusor muscle and contraction of the internal sphincter

Question 14

during urination, _____ control predominates

Answer 14

parasympathetic; causing contraction of the detrusor muscle and relaxation of the internal sphincter

Question 15

autonomic centers in the brain stem function as

Answer 15

relay stations for control initiated at higher levels in the brain.