Bladder and Sphincters (Task 3)

Question 1

Embryonic origin of the bladder

Answer 1

Endoderm Layer

Mesoderm for Trigone

Question 2

Shared opening of GI and urogenital tracts in embryo

Answer 2

Cloaca

Question 3

Can cause urine to leak from umbilicus

Answer 3

Patent Urachus

Question 4

Form the trigone

Answer 4

Entry points of the two ureters and the urethral exit point

Question 5

Blood supply to bladder

Answer 5

Internal Iliac > Superior Vesical Branch

Supplemented by inferior vesicle artery in men and the vaginal artery in women

Question 6

Venous drainage of bladder

Answer 6

Vesical plexus > Internal Iliac

Vesical plexus and prostatic plexus linked in males

Question 7

Lymphatic drainage of bladder

Answer 7

External and Internal Iliac Nodes

Question 8

Sympathetic supply to bladder

Answer 8

Hypogastric Nerve (T12-L1)
Relaxes Detrusor and promotes urine retention

Question 9

Parasympathetic supply to bladder

Answer 9

Pelvic Nerve (S2-S4)
Contracts Detrusor and promotes micturition

Question 10

Somatic supply to bladder

Answer 10

Pudendal Nerve (S2-S4)
Allows for voluntary control of external sphincter

Question 11

Part of brain associated with micturition

Answer 11

Pontine Micturition Centre (PMC)

Question 12

Nucleus which is inhibited by PMC to relax internal sphincter

Answer 12

Onuf’s Nucleus

Question 13

Receptor type on detrusor muscle

Answer 13

M3 Muscarinic Ach Receptors

Question 14

Lesions above this level can cause incontinence

Answer 14

T12

Question 15

Fascia which is continuous with dartos fascia of penis

Answer 15

Scarpa’s Fascia

Question 16

Fascia which is continuous with dartos fascia of scrotus

Answer 16

Colle’s fascia

Question 17

Urethra parts from top down

Answer 17

Pre Prostatis > Prostatic > Membranous > Bulbar > Spongy

Question 18

Fascia preventing a rupture leaking urine to the thighs

Answer 18

Fascia Lata