Question

muscular movements that mix food in the lumen of the small intestine is referred to as
absorption.
elimination.
secretion.
segmentation.
skill: knowledge
muscularis.
question 8
which one of the following is the middle section of the small intestine:
ileum
jejunum
duodenum
ascending colon
descending colon

Explanation:

For the first question, segmentation is the muscular movement that mixes food in the small intestine lumen. Absorption is the process of nutrients entering the bloodstream, elimination is waste removal, secretion is substance release, and muscularis is a tissue layer.
For the second question, the small intestine has three parts: duodenum (first), jejunum (middle), and ileum (last). Ascending and descending colon are parts of the large intestine.

Answer:

First question: segmentation.
Second question: jejunum.