Question

What will happen if lining "X" shown in the figure of the transverse section of the gut is smooth instead of having such folding?

1. Alkaline pH is changed to acidic.
2 Surface area of absorption is enhanced.
3 Surface area of absorption is reduced.
4 None of the above.

Please Provide Some Explanation. Thank You!

Answer 1

Answer:

3 surface area of absorption is reduced

Answer 2

3. Surface area of absorption is reduced if lining X shown in the figure of the transverse section of the gut is smooth instead of having such folding.

Explanation:

• The mucosa consists of epithelium, an underlying loose connective tissue layer called lamina propria, and a thin, smooth muscle layer called the muscularis mucosa.
• In certain regions, the mucosa develops folds that increase the surface area.
• Certain cells in the mucosa secrete mucus, digestive enzymes, and hormones.
• The lining of the small intestinal mucosa is very highly specialized for maximizing digestion and absorption of nutrients.
• The lining is highly folded to form microscopic finger-like projections called villi which increase the surface area to help with absorption.