The digestion of starch begins in the mouth. Saliva contains an enzyme that digests starch before it enters the stomach. This makes the starch easier for the body to metabolize, providing the body with energy just a little bit quicker.Know More
The enzyme is called amylase, and it is secreted while you chew. Amylase breaks starch down into a simpler sugar called maltose. Any amylase absorbed by the starch will continue to act even within the stomach's highly acidic environment for up to 2 hours, although amylase on the surface of the starch will be destroyed. The stomach also contributes some of its own amylase to the digestive mix, via secretions of the enzyme by the pancreas.
Once the starch is broken down into maltose, the maltose is absorbed by the lining of the small intestine. An enzyme called maltase breaks the maltose down further, into two molecules of glucose. Glucose is the basic sugar that the body has the easiest time metabolizing. The glucose produced travels through the lining of the small intestine into the blood, and from there it enters bodily cells which need energy for basic life processes. Any glucose not used immediately is converted into fat for storage.Learn More
The amount of time that digestion takes varies from person to person, but on average it takes around 33 to 50 hours. It takes 6 to 8 hours for food to pass through the stomach.Full Answer >
The digestion of proteins begins, as does all digestion, with the mechanical process of chewing food, and it ends with the absorption of the proteins' constituent amino acids by the cells of the body. About.com describes the process at length, ranging from mechanical to chemical digestion, and even lists the specific enzymes involved in the chemical digestion of proteins at various stages along the way.Full Answer >
The enzyme that breaks down starch is amylase. Starch is a type of complex carbohydrate made by plants and consists of glucose subunits. Amylase breaks starch into constituent sugar molecules.Full Answer >
Starch is a polysaccharide that is essential for storing energy in plants. Humans consume starch and process it into glucose as a vital energy source.Full Answer >