Carbohydrate Digestion Glucose Model A carbohydrate also called

Carbohydrate Digestion Glucose Model

• A carbohydrate, also called a starch, is a long string of glucose and/or other simple sugar molecules chemically bonded together. • A carbohydrate is an organic compound and is found in many of our foods. Potatoes, rice, pasta, corn and breads contain large amounts of starch. • Our bodies cannot absorb these large compounds so our digestive system breaks them up into smaller molecules.

amylase • The breakdown of carbohydrates begins with the saliva in the mouth. • Our saliva contains an enzyme called amylase that begins to break the chemical bonds holding the large carbohydrate molecules together. • The amylase works somewhat like a pair of scissors breaking the bonds between each simple sugar.

• Once carbohydrate digestion is complete, single molecules of glucose are left. Glucose is a small enough molecule to be absorbed by the small intestine. Once it is absorbed, insulin from the pancreas picks it up and carries it to all of the cells in your body.

• The mitochondria in each cell break the glucose apart to release energy. The process in which glucose is broken down is called cellular respiration. Both autotrophs and heterotrophs perform respiration. When glucose is broken down, chemical and thermal energy is produced.

• Glucose has a chemical formula of: C 6 H 12 O 6 • That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.

glucose model You will be building one type of sugar called glucose. Glucose is produced during photosynthesis and acts as the fuel for many organisms. Materials 12 yellow circles 6 green circles 6 pink circles 6

Procedure • For the model, pink is oxygen, green is carbon and yellow is hydrogen. The lines represent chemical bonds. Keep in mind that chemical bonds are forces and not physical connections. • Glue in the colored squares in the key.

Procedure 1. Use the pink circles to represent the oxygen (O) atoms and the green circles to represent carbon (C) atoms.

Procedure 2. Add the sixth carbon (green) to the carbon that is next to the oxygen atom.

Procedure 3. To each of the remaining carbon atoms, attach an oxygen atom (pink).

Procedure 4. Using white for hydrogen attach them each place that it is shown in the diagram.

5. Glue your glucose model into your spiral.