What best describes the primary role of enterocytes in relation to lactase?

• A. Producing mucus for protection
• B. Absorbing nutrients from digested food
• C. Digesting disaccharides like lactose
• D. Transporting waste out of the intestine

Answer: (C)

Enterocytes are specialized epithelial cells that line the intestinal mucosa, and they play a crucial role in digestion and nutrient absorption. The primary function of enterocytes in relation to lactase is indeed to digest disaccharides such as lactose. Lactase is an enzyme located on the microvilli of enterocytes that catalyzes the hydrolysis of lactose, which is a disaccharide composed of glucose and galactose, into its monosaccharide components. This process is essential for lactose digestion, allowing these simpler sugars to be absorbed into the bloodstream.

In this context, while enterocytes are involved in nutrient absorption, their specific role concerning lactase is focused on the digestion of lactose. Therefore, the function of lactase directly aligns with the digestion of disaccharides, emphasizing the critical role of enterocytes in processing carbohydrates in the intestine. This distinction clarifies the primary relationship between enterocytes and lactose metabolism.