Trace what happens to a piece of bread as it enters the mouth to the large intestine. Be sure to mention each organ of the digestive system and what happens to the bread in each part. ( can you put it in high school level)

Bread is a carbohydrate.

Digestion of carbohydrates begin from the mouth.

As the bread is eaten and it is been chewed, the salivary amylase act on it.

This is also called mastication which is the breaking down of large pieces of bread into smaller pieces.

The salivary amylase break the monomeric bond between the dissacharides and starches by breaking amylose and amylopectin into smaller glucose.

When it's get to the stomach there is no further breaking down in the stomach because amylase do not get to the stomach because of stomach acidity. The strong peristaltic contraction of the stomach make it to form uniform chyme.

When the chyme entered the small intestine, the pancrease releases the pancreatic juice which contain amylase that breakdown dextrins into shorter carbohydrates. Additional enzymes are released which break maltose into two glucose and this enzyme is called maltase.

Sucrase breakdown sucrose into glucose and galactose.

There are cells in the small intestines which contain membranes that have protein transport which get monosaccharides and other nutrients to be absorbed in the blood.

The liver receive glucose, fructose and galactose and store them which is later use by the cells.

Explanation:

Digestion is the breakdown of large complex food into smaller pieces which can be easily absorbed by the body.

The goal of carbohydrates digestion is to breakdown complex carbohydrates and dissacharides into monosaccharide that can be absorbed into the body.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.