In June, USA TODAY highlighted the flow of marijuana from Colorado into small towns across Nebraska: felony drug arrests in Chappell, Neb., just 7 miles north of the Colorado border have skyrocketed 400% in three years.
Intestinal Absorptive Cells. Absorptive cells, or enterocytes, are the predominant epithelial cell type lining the lumen of the small intestine and colon. These cells are specialized for absorption of nutrients across the apical plasma membrane and export of these same nutrients across the basal plasma membrane.
The absorptive surface area of the small intestine is increased by plicae circulares, villi, and microvilli. Exocrine cells in the mucosa of the small intestine secrete mucus, peptidase, sucrase, maltase, lactase, lipase, and enterokinase.Endocrine cells secrete cholecystokinin and secretin. The most important factor for regulating secretions in the small intestine is the presence of chyme.he small intestine is divided into the duodenum, jejunum, and ileum. The small intestine follows the general structure of the digestive tract in that the wall has a mucosa with simple columnar epithelium, submucosa, smooth muscle with inner circular and outer longitudinal layers, and serosa.