Lactose intolerance is caused by the lack of the enzyme lactase, which is normally found in the

A. lumen of the stomach.
B. membranes of cells in the small intestine.
C. endothelium of capillaries in the large intestine.
D. inside of cells in the large intestine.
E. inside of cells of the liver and gall bladder.


Answer: B

Anatomy & Physiology

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