Based off this pic:
External urinary sphincter: inhibits (via pudendal nerve) Hypogastric nerve: α1 receptor → contracts internal urethral sphincter → inhibits Pelvic nerves Correct! M3 receptor → contracts detrusor muscle Pudendal nerve: inhibits (Nictonic receptor) → contracts external urethral sphincter → inhibits
External urinary sphincter inhibits (via pudendal nerve)
Hypogastric nerve α1 receptor → contracts internal urethral sphincter → inhibits
Pelvic nerves Correct! M3 receptor → contracts detrusor muscle
Pudendal nerve: inhibits (Nictonic receptor → contracts external urethral sphincter → inhibits
Here is my summary of the picture/video that was posted:
There are 3 pathways involved in peeing:
Pelvic n. (aka pelvic splanchnic n.) sends parasympathetic fibers to deltrusor to contract --> squeeze bladder and pee.
Hypogastric n. sends sympathetic fibers to the deltrusor to relax, as well as the internal sphincter to contract --> hold back pee
Pudendal n. sends somatic fibers (under conscious control) to the external sphincter to contract --> hold back pee
In this question, the patient's bladder is filling up so much that it's forced to overflow. That means there is a problem with scenario 1 - damage to pelvic n. so that he can't squeeze his bladder even when it's super full.
heT aslarc imtuintoicr treenc is 1 fo 3 ptmensocno fo ioitumnritc xelfre (other 2 ear morf epiontn irclatuer otirnmafo dan ralrbeec x)ort.ce Sclraa mtci rtenec = 24S-S sanlip dcro lvlee gitlnvare mfor anrtelv tihew meratt ni hte Piclev eevsnr, eneosrsibpl rfo ardlbde oonitctrcan iav hte gliconcierh senevr (hntki ti atsc no the 3M peceotrr ni eth leddbar or?td.u)rse fI uyo elos eeths sreevn e(..i in civple cetu)r,rfa wlil slretu ni rolfwove nnoinnitceec.
pelvic nerve--> increases voiding urine, m3 receptor, parasympathetic hypogastric nerve--> increases urinary retention, sympathetic, beta 3 and alpha1 receptors. pudendal nerve--> not part of micturition, its a somatic component and has a nicotinic receptor.
iisrlygnrspu doog oianneplaxt nda cpreitu oundf on tsih sie.t nhsigotme aognl eht nelsi fo uinaoirittmnc xeerfl (aak labdred is lulf and ouy piss )xefelr is gone so teh effetanr iesbrf gcirrnya eth lnaigs atht the ebladdr is lulf traen' g.nwrkio toehs esfibr rae crraied in hte peiclv nevres