Urinary Continence and Renal System Pain

Question 1

Ureteric peristalsis and bladder contraction is controlled by which nerve modalities?

Answer 1

COntains smooth muscle => Involuntary => Under autonomic control => SYMPATHETIC/PARASYMPATHETIC

Question 2

Only S/PS control urethral sphincters. TRUE/FALSE?

Answer 2

FALSE.
S/PS - internal sphincter
SOMATIC MOTOR –> External sphincter + levator ani (contraction holds urine in bladder.)

Question 3

Most of the sensory component of the renal system is conveyed via visceral afferents. Which parts are also conveyed via somatic sensory?

Answer 3

Pain from urethra thats in perineum (not the part in pelvis)

Pain from the testsis can present somatically

Question 4

Sympathetic fibres travel to innervate the urinary tract via which nerves?

Answer 4

Abdominopelvic splanchnic nerves

Question 5

Parasympathetic nerve fibres carried within Vagus nerve (CNX) innervate which structures of the urinary tract?

Answer 5

Kidneys and ureters

Question 6

Parasympathetic innervation of the bladder occurs through which nerves?

Answer 6

Pelvic splanchnic nerves

Question 7

Which named nerves carry somatic sensory to the perineum?

Answer 7

Pudendal (S2-S4) to external urethral sphincter muscle.

Nerve to levator ani (S3,4)

Question 8

Only males have an external urethral sphincter? T/F

Answer 8

F. only males have an INTERNAL urethral sphincter to prevent retrograde ejaculation (into bladder)

Question 9

The internal urethral sphincter is under ___ control and is stimulated by ____ fibres to contract?

Answer 9

Autonomic control
Sympathetic fibres stimulate contraction
(parasympathetic allow relaxation => urine can flow through the urethra)

Question 10

Visceral afferents often accompany SYMPATHETIC/PARASYMPATHETIC fibres as they travel back to CNS?

Answer 10

SYMPATHETIC