Segmentation is
A)the primary motility in the small intestine during digestion of a meal
B)both mixing and propulsive
C)sequential ring-like contractions that sweep downward, creating a stripping motion that pushes the chyme forward
D)a and b
E)all of the above

Question

Quizplus · Accepted Answer

Segmentation is both mixing (due to the back-and-forth motion) and propulsive (due to the forward movement of chyme) in the small intestine, making it the primary motility during digestion. It involves sequential ring-like contractions that push the chyme forward, creating a stripping motion that helps to mix and break down food. Therefore, option D, which includes both A and B, is the correct answer. Option E, however, is incorrect because sequential ring-like contractions are the only form of motility during segmentation, while other movements occur in other parts of the digestive tract.

Segmentation Is