8: Anatomy - Faecal continence Flashcards Preview

Gastrointestinal Week 4 2016/17 > 8: Anatomy - Faecal continence > Flashcards

Flashcards in 8: Anatomy - Faecal continence Deck (62)
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1

What structures are included in the distal GI tract?

Rectum

Anal canal

Anus

2

What is the function of the distal GI tract?

Excrete stool

3

What is the holding area for faeces?

Rectum

4

Which nerve fibres supply the rectum to detect its level of "fullness"?

Visceral afferents

5

Muscle sphincters in the distal part of the anus (contract / relax) to prevent defecation.

contract

6

Muscle sphincters in the distal part of the anus (contract / relax) to allow defecation.

relax

7

The rectum is located within the ___ cavity.

pelvic

8

Which muscle forms the pelvic floor?

Levator ani muscle

9

Which tracts pass through the levator ani?

GI tract

Renal tract

Reproductive tract

10

At which line does the sigmoid colon become the rectum?

Recto-sigmoid junction

11

At which vertebral level is the recto-sigmoid junction found?

S3

12

Which part of the rectum stores most of the faecal material and is found superior to the levator ani?

Rectal ampulla

13

The walls of the rectal ___ can relax to accomodate faeces.

ampulla

14

What lies anterior to the inferior rectum in males?

Prostate gland

15

What lies anterior to the inferior rectum in females?

Vagina and cervix

16

When naming pouches, what does "vesico/vesical" mean?

Bladder

17

What is the pouch found in the abdominal cavity of males?

Rectovesical pouch

18

What are the two pouches found in the abdominal cavity of females?

Rectouterine pouch (of Douglas)

Vesicouterine pouch

19

Which muscle supplies support for the pelvic organs?

Levator ani

20

Which branch of the sacral plexus supplies the levator ani?

"Nerve to levator ani"

not joking

21

The pudendal nerves supply the levator ani. At which vertebral levels do these nerves originate?

S2,3,4

s2,3,4 keeps the pelvis off the floor

22

Which muscle of the levator ani acts like a sphincter to constrict the rectum voluntarily?

Puborectalis

23

Which two anal sphincters maintain faecal continence?

 

 

 

 

 

Internal anal sphincter

External anal sphincter

24

Which type of muscle makes up the internal anal sphincter?

Smooth muscle

25

Which type of muscle makes up the external anal sphincter?

Skeletal muscle

26

The anal canal is found inferior to the ___ junction.

anorectal

27

Which autonomic nerves contract the internal anal sphincter?

Sympathetic nerves

fight or flight - why would you defecate while running away from a lion

28

Which autonomic nerves relax the internal anal sphincter?

Parasympathetic nerves

29

Which stimulus relaxes the internal anal sphincter?

Distension of the rectal ampulla

30

Which nerve stimulates the contraction of the external anal sphincter?

Pudendal nerve

S2,3,4