The digestive system GapFill

Most of the reactions that take place in the body, including those that play a role in digestion, are catalysed by enzymes. Enzymes are made of  waterionsproteinsoxygencarbohydrateslipids, and their shape is what allows them to perform their role. They work under very specific conditions, including specific  concentrationspHhumiditiestimespressureslight intensities and temperatures. Beyond these ideal conditions, bonds break in the enzymes, stopping them from working.

Enzymes have an  active siteactive locationactive areaactive zoneactive openingactive section, which is the part of the molecule into which substances fit. This part is very specific to a single type of molecule. It is due to this that scientists use the term  shoe and footopen and closedoor and handlein and outhand and glovelock and key to describe the model.

Examples of enzymes that work in the digestive system include amylase, protease and  lipasefataseoxasedigestasehaemasesugarase. Salivary glands produce the enzyme  carboxylaseamylaseproteasehydrolasehelicaseoxidase, which starts the digestion of starch. Digestion is essential for breaking down large molecules, such as those consumed in food. Without this process, large molecules would not be able to be absorbed by the body.

Proteins are broken down by enzymes into  fatty acidsoxygenglucoseoilsamino acidswater, which the body can use to make new proteins. Similarly, complex carbohydrates can be broken down into simple sugars, including  methanecarbon dioxideleucineglucosetriglyceridehydrochloric acid, which can be used during respiration. The breakdown of fats is performed by bile and enzymes in coordination, as bile  lengthensemulsifiesdestroysgeneratessolidifiesburns fats to increase the surface area for enzymes to work on.