Question

What initiates a signal for defaecation?

• A. Faeces in the colon
• B. Faeces in the rectum
• C. Faeces in the caecum
• D. Faeces in the ileum

Answer 1

Answer:

B. Faeces in the rectum

The digestive wastes, solidified into coherent faeces in the rectum initiate a neural reflex causing an urge or desire for its removal. Defaecation is a voluntary process and is carried out by mass peristaltic movements.