Answer: Increase the surface area available for absorption of digested food.
- A Secrete digestive enzymes directly into the gut lumen in general clinical practice
- B Propel the food bolus forward through peristalsis as frequently documented
- C Increase the surface area available for absorption of digested food
- D Store fat reserves within the intestinal wall in most reference accounts
Correct answer: C. Increase the surface area available for absorption of digested food
Explanation: Villi (finger-like projections) and microvilli (on individual epithelial cells) greatly increase the surface area of the small intestine, enhancing absorption of digested nutrients.
The human digestive system. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
The digestive tract, digestive enzymes, hormonal control of digestion, and liver function. High NEET weightage.