▶️ Answer/Explanation
The process described is assimilation. While absorption involves the movement of nutrients from the digestive system into the bloodstream, assimilation refers specifically to the movement of those nutrients into the body’s cells to be utilized for energy or growth. In this stage, simple molecules like glucose or amino acids are incorporated into the actual structure of the cell. Digestion is the breakdown of food, and ingestion is simply taking food in. Therefore, the integration into cellular structure defines assimilation.
✅ Answer: (B)
▶️ Answer/Explanation
The duodenum is the first part of the small intestine where the most critical stages of chemical digestion occur. It receives chyme from the stomach and mixes it with bile from the gallbladder and digestive enzymes from the pancreas. These enzymes break down complex carbohydrates, proteins, and lipids into simpler molecules. While absorption begins later in the small intestine, the primary role of the duodenum is completing the breakdown of food. In contrast, ingestion occurs in the mouth, assimilation happens in body cells, and egestion occurs via the anus. Therefore, the duodenum is a site specifically dedicated to digestion.
✅ Answer: (B)
✅ Answer: (B)
