Question

0.5 pts When a person has celiac disease, exposure to wheat gluten causes damage to that person's small intestine. Eventually, the villi are destroyed and the lining of the small intestine becomes smooth/flat. What is the most likely effect on nutrient absorption? no effect on nutrient absorption nutrient absorption efficiency would decrease: person would be more prone to undernutrition (not enough nutrients, weight loss) nutrient absorption efficiency would increase; person would be more prone to overnutrition (too many nutrients, weight gain) 0.5 pts Question 8 Exit of the contents of the colon is regulated by two muscular sphincters. True False
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Answer 1

0.5 pts When a person has celiac disease, exposure to wheat gluten causes damage to that person's small intestine. Eventually, the villi are destroyed and the lining of the small intestine becomes smooth/flat. What is the most likely effect on nutrient absorption? The inner surface of the intestine appears similar to a velvet due to the presence of projections of mucous membrane lining it. These projections are known as "intestinal villi.” The intestinal villi are most prominent in the duodenum and proximal jejunum, which project into the humen of alimentary canal Each intestinal villi consists of a layer of columnar epithelium, connective tissue with blood capillaries, nerve fiber and lacteal (lymphatic capillary). O no effect on nutrient absorption nutrient absorption efficiency would decrease; person would be more prone to undernutrition (not enough nutrients weight loss) The microvilli project from the free surfaces of these epithelial enterocytes, which form the brush border epithelium. The microvilli increase the surface area of the small intestine and increase the rate of nutrient absorption. The microvilli also contain the digestive enzymes. O nutrient absorption efficiency would increase person would be more prone to overnutrition (too many nutrients, weight gain) So, the destruction of intestinal villi decrease the absorption efficiency of the nutrients. D Question 8 0.5 pts Exit of the contents of the colon is regulated by two muscular sphincters. True The contents of the colon is regulated by two muscular sphincters, the internal and external anal sphincters