Question

State which of the following statement is true OR false.
(A) No absorption of food takes place in mouth and oesophagus.
(B) Absorption of glucose depends on sodium ion.
(C) Whole protein particles can be engulfed by pinocytosis.

• A. B and C are true, A false
• B. All are true
• C. A and C are true, B is false
• D. A and B true, C false

Answer 1

The correct option is D A and B true, C false

• After food is being swallowed, from the mouth it is transported to the stomach. No absorption of nutrients takes place in the mouth and oesophagus. Hence, No absorption of food takes place in the mouth and oesophagus.
• Active glucose absorption is thought to depend on a gradient of sodium ion concentration across the brush border membrane of intestinal epithelial cells. Specifically, glucose absorption was minimally reduced when intraluminal sodium concentration was reduced. Hence, Absorption of glucose depends on sodium ion.
• Pinocytosis is the absorption of liquids, whereas phagocytosis is the absorption of solid objects which are essentially food for the cell. Phagocytosis engulfs whole particles, which are later broken down by enzymes, such as cathepsins, and absorbed into the cells. Hence, Whole protein particles cannot be engulfed by pinocytosis.

So, the correct answer is 'A and B true, C false'.