Question

1. which of the following cells has the greatest efficiency? explain why.

a. section of a villus - an extension of the small intestinal wall
b.

Explanation:

Cell efficiency is related to surface - area - to - volume ratio. Cell 2 (Brush Border Epithelium Cell with Microvilli) in part a has microvilli which increase its surface area. A higher surface - area - to - volume ratio allows for more efficient absorption (in the context of intestinal cells). For part b, assuming similar volume, a flatter cell (Cell 2) has a larger surface area compared to a spherical cell (Cell 1). A larger surface area (for a given volume) means more efficient exchange of substances (e.g., nutrients in and waste out).

Answer:

In part a, Cell 2 (Brush Border Epithelium Cell with Microvilli) is the most efficient. Microvilli increase its surface area, enhancing absorption. In part b, Cell 2 (the flatter cell) is more efficient. A flatter shape provides a larger surface - area - to - volume ratio for better substance exchange.