Pelvis, Perineum, and Micturition

Question 1

osseus pelvis

Answer 1

sacrum and both os coxae

Question 2

pelvic viscera

Answer 2

rectum, anal canal, distal ureters, bladder, urethra, genetalia

Question 3

perineum

Answer 3

region and caudal wall of pelvic cavity

muscles fascia and skin surrounding anal canal and urogenital tract

Question 4

pelvic diaphragm

Answer 4

levator ani and coccygeus muscles with deep fascia

Question 5

genital striated muscle in male and female

Answer 5

male - bulbospongiosus and ischiocavernosus

female - constrictor vestibuli, constrictor vulvae, and ischiocavernosus

Question 6

smooth muscles of perineum

Answer 6

rectococcygeus and retractor penis

Question 7

trigone of bladder

Answer 7

region of neck demarcated by ureters and urethra

Question 8

detrusor muscle

Answer 8

smooth muscle coat of apex and body of bladder
innervated by pelvic nerve
prolonged contraction required for micturition

Question 9

internal urethral sphincter

Answer 9

smooth muscle on cranial urethra innervated by hypogastric nerve
exerts tonic activity after bladder is half full

Question 10

external urethral sphincter

Answer 10

striated urethralis muscle on caudal urethra innervated by pudendal nerve
activated voluntarily or reflexly due to pressure increase (sneeze, cough etc)

Question 11

Signal Pathway for Micturition

Answer 11

receptors, GVA fibers in pelvic nerve, ascending path, pons, descending path, activate detrusor and inhibit sphincter

Question 12

unique bladder features of cat

Answer 12

preprostatic urethra and bulbourethral gland