
To determine: Whether the lumen of the digestive tract is located on the apical side or basolateral side of the intestinal epithelium.
Introduction: The

Explanation of Solution
The lumen of the digestive tract is located on the apical side of the intestinal epithelium. The apical side of the intestine is covered with microvilli, which increases the surface area for absorption. Partially digested food enters into the small intestine from the stomach and small intestine digest it properly and absorbs the nutrient.
The lumen of the digestive tract is located on the apical side of the intestinal epithelium.
To determine: Whether the lumen of the digestive tract is located on the serosal side or mucosal side of the intestinal epithelium.
Introduction: The length of the small intestine of humans is about 20 feet long. Small intestine lies between the stomach, and large intestine and its primary function of the small intestine is the absorption of the food.

Explanation of Solution
The lumen of the digestive tract is located on the mucosal side of the intestinal epithelium. Mucosal cells comprise transporting epithelial cells, the exocrine and endocrine secretory cells as well as stem cells. The epithelial cells are also called enterocytes in the small intestine. The cells secrete mucus, ions, paracrine molecules, and enzymes into the lumen at the apical and mucosal surface of the epithelium.
The lumen of the digestive tract is located on the mucosal side of the intestinal epithelium.
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Chapter 21 Solutions
EBK HUMAN PHYSIOLOGY
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