Question

i File Edit View History Bookmarks Window Help ng.cengage.com CENGAGE I MINDTAP Aplia Homework: The Digestive System Back to Assignment Attempts: 8. The small intestine Around seven meters long, the small intestine makes up the longest section of the digestive tract. Take a look at how the Average: /16 four digestive processes occur in the small intestine The small intestine has two major forms of motility: segmentation and the migrating motility complex (MMC). Both forms can be observed in the following diagram, which is a recording of contractile activity at three stes along the small intestine. To the right of the diagram, identify where each recording took place. (Hint: Focus on the period of time during which the MMC occurs and compare the relative timing and intensity of contractions at each site.) Feeding You can observe one form of motility during fasting and the other form after feeding. Postn Recording Site At the time and location indicated by the symbol *, s occurring. Time [Hr) Digestion and absorption occur along the small intestine's mucosal lining, which has the approximate overall surface area of a tennis court. This impressive surface area is partly due to the organization of the mucosal cells into structures called vill. A single villus is pictured here. Answer the questions within the three inset boxes W P

Answer 1

Recording sites-

1. Migrating motility complex
2. Segmentation motility
3. Migrating motility complex

Segmentation motility-Segmentation contractions are a type of intestinal motility which involves contractions of the circular muscles in the GIT, while peristalsis involves rhythmic contractions of the longitudinal muscles in the GIT.

Migrating motility complex- Migrating motor complexes are waves of electrical activity that generally sweeps through the intestines in a regular cycle during fasting.