Question

Epithelial cells of the intestine involved in the absorption of food have ______on their surface.
A. Pinocytic vesicles
B. Phagocytic vesicles
C. Microvilli
D. Zymogen granules

Answer 1

Hint:
The small intestine is an organ in the gastrointestinal tract where most of the nutrient absorption takes place from food. It is situated between the stomach and large intestine and obtains pancreatic juice and bile through the pancreatic duct to help in digestion. The small intestine is about 18 feet long and tucks many times to fit in the abdomen.

Complete step by step answer:
Cellular extracellular fluid is transported into the cells via pinocytotic vesicles. In general, pinocytosis occurs when small particles suspended in extracellular fluid are brought into the cell through the invagination of the lipid membrane.
Phagocytic vesicles are formed by combining plasma membranes around large particles during phagocytosis. Eventually, phagocytic vesicles fuse with lysosomes to accelerate particulate degradation through a variety of oxidative chemicals and hydrolytic enzymes. An exocrine pancreas has specialized storage organelles called zymogen granules that allow the separation, packaging, and regulated release of digestive enzymes at the apex.
Microvilli are small finger-like projections about 1 mm long and 90 nm wide, which are shorter and narrower than cilia. Cross-linking proteins called villi and fimbrin hold bundles of parallel actin filaments together into a bundle. These projections help in the absorption of nutrients such as amino acids and glucose via simple diffusion through the semipermeable membrane.

Option ‘C’ is correct

Note:
Most chemical digestion occurs in the small intestine. A large number of digestive enzymes enter the small intestine via the pancreatic duct from the liver and pancreas.