Digestion And Nutrition Essay, Research Paper Explain why digestion of large food molecules is essential o Large food molecules must be digested as they are
Digestion And Nutrition Essay, Research Paper
Explain why digestion of large food molecules is essential o
Large food molecules must be digested as they are
crucial to our bodies. We would die if we could not digest them Explain the needs for enzymes in digestion o
Enzymes are 3D globular proteins. They increase the
rate of reaction though they are not part of the reaction. They lower the
activiation energy i.e. the amount of energy needed for reaction to occur.
Biological Catalysts State the source, substrate and optimum pH for one of each type
of enzyme Source Source ?Substrate Products ?Optimum pH Salivary amylase Salivary glands ?Starch Maltose Neutral/slightly alkaline Pepsin Stomach ?Protein ?Polypeptides ?Very acidic Pancreatic lipase ?Pancreas ?Fats Monoglycerides and fatty acids Alkaline Draw a diagram of the digestive system including mouth,
oesophagus, stomach, small intestine, large intestine, anus, liver, pancreas
and gall bladder Draw a villus in vertical section Define absorption
Absorption is the movement of a molecule(s) across a
membrane; usually by active transport in humans Explain the concept of a balanced diet
A balanced diet is one that supplies all the necessary
nutritional foodstuffs. Age may determine which foodstuffs are prioritised.
Health is also a determining factor. Explain the general importance of vitamins and minerals
Vitamins and Minerals are health enhancers but it is
their abcense in the body that signifies a problem. They are involved in many
small ways to maintain normal growth and metabolism. o
Vitamins are organic compounds o
Minerals are organic elements Outline the problems associated with Obesity o
where body weight is 20% greater than the maximum body
weight desirable for a person?s height. o
Probably the oldest metabolic disorder o
Occurs when excess food stored in body. o
Risk of Cororany Heart disease, strokes, diabetes, Gall
Bladder disease. o
Caused by ?
lack of exercise ?
smoking and drinking ?
bad diet ?
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