What is the primary anatomical function of the gallbladder in the human digestive system?
Answer and explanation
Correct answer: A. Storing and concentrating bile produced by the liver
- Step 1: The gallbladder is a small, pear-shaped muscular sac nestled beneath the right lobe of the liver.
- Step 2: Between meals, it receives bile from the liver and concentrates it 5- to 10-fold by absorbing water and electrolytes; upon ingestion of dietary fats, the hormone cholecystokinin (CCK) triggers gallbladder contraction to discharge bile into the duodenum.
Answer
Storing and concentrating bile produced by the liver
Why not the others: 'Synthesizing digestive enzymes like amylase and lipase' Digestive enzymes like amylase, lipase, and proteases are synthesized by the pancreas and salivary glands; 'Filtering metabolic waste products from blood' Blood filtration and urea excretion are performed by nephrons in the kidneys; 'Absorbing water and solidifying waste into feces' Water reabsorption and fecal compaction are carried out in the large intestine.
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