How often are cells lining the intestinal tract replaced?

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  1. How often are cells lining the intestinal tract replaced?1.Every 120 days2.Every 1 to 3 days3.Every month4.Every 7 days
    Which of the following statements about ulcers is false?1.Ulcers occur most often in the duodenum, or upper part of the small intestine.2.Ulcers are can be treated with a variety of different medications and probiotics.3.Ulcers are associated with the presence of Helicobacter pylori.4.Ulcers occur most often in the esophagus.

  2. Where are “villi” found in the body?1.In the esophagus2.In the stomach3.In the small intestine4.In the gallbladder
    What is the leading cause of iron-deficiency anemia in children?1.Exposure to lead2.Inadequate intake of dietary protein3.Inadequate intake of dietary iron4.Decreased iron absorption due to infection
 
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