ObjectiveMcq
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Match the names of the organs of the human digestive system given in Column I with their functions in Column II.
Column I | Column II
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A. | Mouth | i. | Has villi for increasing the area of absorption
B. | Stomach | ii. | Secretes bile that helps in digestion of fats
C. | Liver | iii. | Absorbs water and some salts from undigested food
D. | Small Intestine | iv. | Breaking down of starch to sugar
E. | Large Intestine | v. | Secretes acid to help digestive juices to act
Correct Answer: B — A - iv, B - v, C - ii, D - i, E - iii
The correct answer is A - iv, B - v, C - ii, D - i, E - iii.
Mouth: The mouth is responsible for the initial stage of digestion. It helps in the mechanical breakdown of food through chewing and the chemical breakdown of starches by the enzyme amylase, which converts starch into sugar.
Stomach: The stomach secretes gastric juices including hydrochloric acid and enzymes, which help break down proteins and kill bacteria present in the food.
Liver: The liver produces bile, stored in the gallbladder and released into the small intestine, which aids in the digestion and absorption of fats by emulsifying them into smaller droplets.
Small Intestine: The main site for digestion and absorption of nutrients. Its intestinal walls have finger-like projections called villi, which increase the surface area for absorption of digested nutrients into the bloodstream.
Large Intestine: Responsible for the absorption of water and electrolytes from undigested food, and houses beneficial bacteria that aid in fermentation of undigested carbohydrates and production of certain vitamins.