MRCP UK EXAMINATIONS

ABDOMINAL

GASTROINTESTINAL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What does the ileocecal valve do?
A
Generates segmentation contractions.
B
It restricts the reflux of colonic contents and especially the large number of commensal bacteria into the relatively sterile ileum.
C
Segmentation contractions, which shift chyme from one side to the other and increase its contact with the mucosal surface.
D
None of the above
Explanation: 

Detailed explanation-1: -Terminology. The ileocecal valve is a sphincter muscle situated at the junction of the ileum (last portion of your small intestine) and the colon (first portion of your large intestine). Its function is to allow digested food materials to pass from the small intestine into your large intestine.

Detailed explanation-2: -Normal Ileocecal Valve The “lips” of the ileocecal valve compress the terminal ileum as it enters the cecum. In most patients, this prevents reflux of colonic contents into the small intestine.

Detailed explanation-3: -Ileocecal valve plays a very important role in the regulation of intestinal transit. It acts as a barrier to delay passage for small bowel contents and hence increases absorption. It also prevents reflux from the caecum into the ileum[1, 2].

Detailed explanation-4: -Thus, anatomical consideration is given the so-called ileocecal valve because of interest in problems of acute large bowel obstruction. This structure supposedly prevents regurgitation of colonic material and gas into the ileum and so accounts for the status of “closed loop” in obstructive lesions of the colon.

There is 1 question to complete.