Final answer:
The primary markers of GI motility are migrating motility complexes and segmentation, which help propel and mix food through the GI tract.
Step-by-step explanation:
The primary markers of GI motility include migrating motility complexes and segmentation.
Migrating motility complexes are a form of peristalsis that occur in the small intestine and help propel the food through the GI tract.
Segmentation refers to the localized contractions in the small intestine that mix and break down the food.