What is the liver's primary function?

• A. Secretes bile
• B. Produces insulin
• C. Breaks down proteins
• D. Stores bile

Answer: (A)

The main concept here is that the liver’s digestive contribution is producing bile, a digestive juice that emulsifies fats to aid their breakdown. Hepatocytes continuously synthesize bile and secrete it into bile ducts, which carry it to the gallbladder for storage and concentration until a meal triggers release into the small intestine. This makes bile production the liver’s most central digestive role among the options. Producing insulin is a pancreatic function, not hepatic. The liver does metabolize and process proteins, but breaking down proteins is not its defining task. Storing bile happens in the gallbladder, not in the liver, so that option doesn’t reflect the liver’s primary duty.