Question

The process of (i)______ is modulated by long powerful waves of contractions of the (ii)______. Once the rectum is filled to 25% of its capacity, a (iii)______ stimulates the desire to defecate. In response to this, we voluntarily relax the external (iv)______ to allow feces to pass from the rectum into the anal canal and out through the anus.

• A. i. Egestion or Defecation ii. Colon iii. Neural reflex iv. Anal sphincter
• B. i. Active absorption ii. Lacteals iii. Passive absorption iv. Colon
• C. i. Duodenum ii. Capillaries iii. Active absorption iv. Passive absorption
• D. i. Passive absorption ii. Ceacum iii. Active absorption iv. Capillaries

Answer 1

The correct option is A i. Egestion or Defecation ii. Colon iii. Neural reflex iv. Anal sphincter

The process of egestion or defecation is modulated by long powerful waves of contractions of the colon. Once the rectum is filled to 25% of its capacity, a neural reflex stimulates the desire to defecate. In response to this, we voluntarily relax the external anal sphincter to allow feces to pass from the rectum into the anal canal and out through the anus