Question

Match the structure of the small intestine with its function.

1. Deep to mucosa;

2. Contain entero-endocrine cells

3. Slow down passage of materials

4. Secrete digestive hormones



-Submucosal glands

-Intestinal glands

-Circular folds

-Enteroendocrine cells

Answer 1

The circular folds slow the passage of materials, the intestinal glands and enteroendocrine cells secrete enzymes and hormones necessary for digestion, and the submucosal glands neutralize stomach acid.

Step-by-step explanation:

The structure of the small intestine is matched with its function as follows:

1. Circular folds: Slow down the passage of materials.
2. Intestinal glands: Deep to mucosa and secrete digestive hormones.
3. Enteroendocrine cells: Contain entero-endocrine cells that secrete digestive hormones.
4. Submucosal glands (Brunner's glands): Produce a bicarbonate-rich alkaline mucus that buffers the acidic chyme as it enters from the stomach.

Each part of the small intestine's structure is specialized to aid in the process of digestion and absorption. The circular folds are physical structures that increase the surface area for absorption and slow the movement of the contents to provide more time for nutrient absorption. The intestinal glands and enteroendocrine cells are vital for secreting digestive enzymes and hormones, respectively. Lastly, submucosal glands aid in neutralizing acid coming from the stomach into the small intestine.