What is the major type of involuntary movement of the GI tract?
Question:
What is the major type of involuntary movement of the GI tract?
Histological Layers of the Alimentary Canal:
Starting at the lumen of the alimentary, the general arrangement in the alimentary tract is as follows:
- The mucosa (composed of a lining epithelium, an underlying lamina propria, and a thin muscularis mucosa).
- The submucosa (a layer of loose connective tissue that contains blood vessels, nerves, mucous glands, and lymphatic tissues).
- The muscularis propria (two layers of smooth muscle, with the inner layer being arranged circularly and the outer layer being arranged longitudinally).
- The adventitia (the outermost layer of connective tissue that is covered by the visceral peritoneum).
Answer and Explanation: 1
Peristalsis is the major type of involuntary movement in the GI tract. The muscularis propria, two layers of smooth muscle sitting outside the submucosa, is responsible for peristalsis.
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Movement Through the Small Intestine: Peristalsis, Segmentation & Pendular Movement
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Chapter 17 / Lesson 5Understand small intestine segmentation. Explore the secretions, contractions, and movements of small intestines. Discover peristalsis and pendular movements.
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