Which of the following statements is true regarding the gallbladder?

• A. It is essential for life.
• B. It cannot store bile.
• C. It is located above the liver.
• D. It concentrates bile for digestion.

Answer: (D)

The gallbladder is responsible for concentrating bile, which is produced by the liver. After bile is produced, it is stored in the gallbladder until it is needed for digestion, particularly in the emulsification and absorption of fats in the small intestine. This concentrating action allows the gallbladder to store bile in a more efficient form, making a smaller volume of concentrated bile available when needed for digestion.

The other statements do not accurately represent the gallbladder's functions or characteristics. For example, while the gallbladder plays a significant role in the digestive process, it is not considered essential for life since individuals can live without it. Additionally, the gallbladder does store bile, contrary to what some choices suggest. As for its location, the gallbladder is actually situated beneath the liver, not above it. Thus, the assertion that the gallbladder concentrates bile for digestion is the accurate statement reflecting its primary function.