Which of the following statement(s) relating to anal sphincteric function is/are correct?
A. When the rectum is distended, the internal anal sphincter relaxes and the external anal sphincter contracts
B. When the rectum is distended, the internal anal sphincter contracts and the external anal sphincter relaxes
C. The external anal sphincter is responsible for resting anal pressure
D. The internal anal sphincter is responsible for resting anal pressure
Answer:A
Which of the following statement(s) relating to anal sphincteric function is/are correct?
A. When the rectum is distended, the internal anal sphincter relaxes and the external anal sphincter contracts B. When the rectum is distended, the internal anal sphincter contracts and the external anal sphincter relaxes C. The external anal sphincter is responsible for resting anal pressure D. The internal anal sphincter is responsible for resting anal pressure