Nervous System Control: Micturition

Question 1

what is the net effect of sympathetic innervation

Answer 1

bladder filling & urinary continence

Question 2

what is the net effect of parasympathetic innervation

Answer 2

bladder emptying & micturition

Question 3

what is the net effect of somatic innervation

Answer 3

conscious control of urinary continence

Question 4

sympathetic NS: nerve

Answer 4

caudal mesenteric ganglia –> hypogastric nerve

Question 5

sympathetic NS: mediator

Answer 5

norepinephrine

Question 6

sympathetic NS: receptors and target sites

Answer 6

B receptors (detrusor muscle)

a receptors (internal urethral sphincter)

Question 7

sympathetic NS: effect

Answer 7

B receptors: bladder wall relaxation

a receptors: smooth muscle contraction (closes the sphincter)

Question 8

parasympathetic NS: nerve

Answer 8

pelvic nerve

Question 9

parasympathetic NS: mediators

Answer 9

acetylcholine

Question 10

parasympathetic NS: receptors and target sites

Answer 10

muscarinic cholinergic receptors (detrusor)

Question 11

parasympathetic NS: effect

Answer 11

mACh receptors: bladder wall contraction

Question 12

somatic NS: nerve

Answer 12

pudendal nerve

Question 13

somatic NS: mediators

Answer 13

acetylcholine

Question 14

somatic NS: receptors and target sites

Answer 14

nicotinic cholinergic receptors (external urethral sphincter)

Question 15

somatic NS: effect

Answer 15

nACh receptors: skeletal muscle contraction