micturition

Question 1

which three nerves are involved in micturition

Answer 1

hypogastric
pelvic
pudendal

Question 2

what receptors are on the detrusor

Answer 2

M3

Question 3

receptors on the external urethral sphincter

Answer 3

nicotinic

Question 4

receptors on the IUS

Answer 4

A1

m3

Question 5

PARASYMPATHETIC effect

Answer 5

ach is released on m3 receptors
causes contraction of detrusor
relaxation of internal sphincter

EMPTYING

Question 6

SYMPATHETIC effect

Answer 6

noradrenaline released onto m3 and A1 receptors
relaxes the detrusor muscle
contraction of ius

RETENTION

Question 7

WHAT is the parasympathetic system goal

Answer 7

voiding

Question 8

what is the sympathetic systems goal

Answer 8

retention

Question 9

retention relfex involves ?

Answer 9

sensory pelvic nerve sends slow impulses to spinal cord as not much stretching
this stimulates the hypogastric nerve
noradrenaline released onto a1 receptors
IUS contracts
relaxation of detrusor
pudendal nerve causes contraction of EUS

Question 10

VOIDING REFLEX INVOLVES ?

Answer 10

bladder is stretched out 
increases pelvic nerve firing 
inhibition of hypogastric - contraction of detrusor 
relaxation of IUS with hypogastric
with pudendal - relaxation of EUS