How often do segmental contractions occur in the small and large intestine?

Segmental contractions in the small and large intestine are responsible for mixing and breaking down food material, as well as facilitating absorption. These contractions occur in a rhythmic manner along the intestinal tract, allowing for effective mixing of the contents with digestive enzymes and ensuring nutrients can be absorbed effectively.

The frequency of segmental contractions is generally observed to occur approximately every 1 cm, making the option of 1 cm the accurate choice. This closer spacing allows for efficient mixing of intestinal contents and optimal digestive function, leading to better nutrient absorption over a relatively short distance within the intestines. The other options suggest less frequent contractions, which would not provide the same level of mixing efficiency needed for digestion and absorption in the intestines. Understanding how these contractions function at this regular interval highlights their critical role in the digestive process.