What is the role of the kidneys and gallbladder?

• A. The kidneys store bile.
• B. The kidneys filter waste from the blood and regulate fluid balance, while the gallbladder stores bile for digestion.
• C. The gallbladder filters blood.
• D. The kidneys produce bile.

Answer: (B)

The main idea is understanding what each organ does for the body. The kidneys filter waste from the blood and help regulate fluid and electrolyte balance, and they also help with acid-base balance and producing urine. The gallbladder, on the other hand, stores and concentrates bile produced by the liver and releases it into the small intestine during digestion to help break down fats.

Bile is produced by the liver, not by the kidneys, and the kidneys do not store bile. The gallbladder does not filter blood. So the correct statement reflects these distinct roles: kidneys handle waste filtration and fluid balance, while the gallbladder stores bile for digestion.