Which of the following best describes albumin and globulins transport function?

Study liver anatomy and function with our medical students test. Engage with detailed multiple choice questions, each with hints and explanations. Prepare effectively for your test!

The main idea is that albumin and the globulins act as carriers for substances that do not dissolve well in water. In the bloodstream, many hydrophobic or water-insoluble molecules—such as fatty acids, lipid-soluble vitamins, bilirubin, certain hormones, and many drugs—bind to these plasma proteins. This binding keeps them in solution, protects them from precipitation, and allows them to be transported to target tissues. Albumin provides multiple binding sites for a variety of such molecules, while different globulins participate in transporting lipids, metals, and other compounds. That broader role—solubilizing and hauling substances insoluble in water—best captures their transport function.

The other options are narrower or inaccurate. Small ions dissolve readily in plasma and aren’t primarily carried by these proteins. Transporting only lipids misses the wide range of solutes they help move. Transporting only water-soluble vitamins ignores the broader set of hydrophobic substances that rely on these carriers.