What emulsifier is found in the liver and is used in the digestive tract?

The bile.

Explanation:

Bile is a greenish yellow liquid produced by the liver. This substance acts in the emulsification of fatty foods. In this case we can say that bile is the emulsifier found in the liver and used in the digestive tract.

Enzymes that would break down the fat particles have difficulty interacting. Hence they need another element to aid in emulsification. This substance is bile. Like detergent, bile acts to break down large particles and shrink them to absorb them.

About one liter of fluid is produced daily and 50 ml is stored in the gallbladder. The bile performs many functions, among the main ones are:

• Fat digestion;

• nutrient storage;

• Facilitates the action of pancreatic enzymes;

• Balances liver bacteria;

• detoxifies the liver;

• Absorbs vitamins;

• Discards substances from the blood.

the answer is a or when it says crossing over

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme