Absorption is described as passage of digestion products across the GI mucosa into blood or lymph.

This statement is **true** and closely follows the lecture’s definition. The mucosa is the interface between the GI lumen and the body, and absorbed products enter either blood or lymph. The statement does not imply that every nutrient follows the same route; it identifies the two destinations named in the material. Absorption is a major GI function because it makes nutrients available to the body after food has been processed. **Key takeaway:** Absorption is mucosal transfer from the tract into blood or lymph.\n\n**Glossary:**\n- **Absorption**: Transfer of digestion products across the GI mucosa.\n- **GI lumen**: The internal channel of the gastrointestinal tract.