Which of the following substances primarily uses simple/passive diffusion for absorption? A) Amino acids B) Glucose C) Proteins D) Lipids

Understand the Problem

The question is asking to identify the substance that primarily uses simple or passive diffusion for absorption among the given options. We need to analyze the absorption mechanisms of each substance.

More Information

Lipids, especially short-chain fatty acids, can be absorbed by simple diffusion due to their hydrophobic nature and small size, allowing them to easily pass through cell membranes.

Tips

A common mistake is assuming amino acids and glucose are absorbed through simple diffusion, but they require protein facilitation due to their polar nature.

Sources

• Chemical Digestion and Absorption: A Closer Look - Lumen Learning - courses.lumenlearning.com