Layer of the GI tract responsible for segmentation.
A) muscularis mucosae
B) muscularis externa
C) lamina propria
D) submucosa
E) serosa

Question

Quizplus · Accepted Answer

The muscularis externa is responsible for segmentation, which is the contraction of small circular muscles that mix and churn the food and help with absorption. The other layers of the GI tract have different functions such as providing support (submucosa), secreting mucus and enzymes (muscularis mucosae), and protecting (serosa).

Layer of the GI Tract Responsible for Segmentation