Essential O Large Food Molecules example essay topic
320 words
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 3 D globular proteins. They increase the rate of reaction though they are not part of the reaction. They lower the activation 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 Mono glycerides 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 ab cense 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 persons height. o Probably the oldest metabolic disorder o Occurs when excess food stored i body. o Risk of Cororany Heart disease, strokes, diabetes, Gall Bladder disease. o Caused by lack of exercise smoking and drinking bad diet over eating.
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