Cecum and colon - Rectum and anus

3 important questions on Cecum and colon - Rectum and anus

What are the 2 layers of the anal sphincter?

1. Internal sphincter: smooth muscles with ENS/PSNS/Pelvic nerve innervation (involuntary control)
2. External sphincter: skeletal muscle with CNS and pudendal nerve innervation (voluntary control)

What is the rectosphincteric reflex?

Filling of rectum with feces due to colonic mass movement causing relaxation of internal sphincter and colonic peristalsis (ENS/PSNS) and relaxation of external sphincters (pudendal nerve) after integration in CNS

What are other effects of the rectosphincteric reflex?

Postural changes, contraction of abdominal muscles, and closure of glottis

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo