What does the gall bladder store before it is released into the small intestine?

The gall bladder stores bile, which is produced by the liver. Bile plays a crucial role in the digestion and absorption of fats in the small intestine. When food containing fats enters the small intestine, the gall bladder releases bile to help emulsify these fats, making them easier for enzymes to break down. This process is essential for the efficient digestion of dietary lipids.

The other substances mentioned do not relate to the gall bladder. Proteins are macromolecules that are digested in the stomach and small intestine but are not stored in the gall bladder. Amylase is an enzyme that breaks down carbohydrates, and while it is important for digestion, it is produced by the pancreas and saliva, not stored in the gall bladder. Hydrochloric acid is found in the stomach and plays a role in digestion but is not involved with the gall bladder's functions. Thus, the correct answer highlights the specific role of the gall bladder in storing bile for fat digestion.