Question

In digestive tract of mammals, water absorption occurs primarily in the ____, where countercurrent exchange of NaCl between the ____ in the villi helps keep osmotic pressure high. This example illustrates that this colligative property, namely osmotic pressure, is important in the digestive system as well as the excretory and circulatory systems with which is it often more closely associated

A. jejunum; lacteals

B. colon; lacteals

C. colon; capillaries

D. jejunum; capillaries

Answer 1

Answer: (A) jejunum; lacteals

Rationale: jejunum is the part of the small intestine in the human body. In digestive system small intestine and colon places a major role in the breakdown of food materials and absorption of good stuffs which is needed for the body like, nutrients, water, fat etc.....

In that jejunum play significant role in the absorption of water and also it will take nutrients form the food particles. All other parts of small intestine absorb the water, But jejunum will absorb more amount of water when compare to other two parts of the small intestine.
lacteals is the capillaries included in the lymphatic system. Which have the capillaries in each villi.