Describe the functions of hydrochloric acid in gastric juice, limited to killing harmful microorganisms in food and providing an acidic pH for optimum enzyme activity
1 Answer State where, in the digestive system, amylase, protease and lipase are secreted and where they act
1 Answer Describe the functions of enzymes as follows: (a) amylase breaks down starch to simple reducing sugars (b) proteases break down protein to amino acids (c) lipase breaks down fats and oils to fatty acids and glycerol
1 Answer State the role of chemical digestion in producing small soluble molecules that can be absorbed
1 Answer Describe chemical digestion as the breakdown of large insoluble molecules into small soluble molecules
1 Answer Outline the role of bile in emulsifying fats and oils to increase the surface area for chemical digestion
1 Answer Describe the function of the stomach in physical digestion
1 Answer Identify in diagrams and images the types of human teeth: incisors, canines, premolars and molars
1 Answer Describe physical digestion as the breakdown of food into smaller pieces without chemical change to the food molecules
1 Answer Describe the functions of the organs of the digestive system in relation to: (a) ingestion – the taking of substances, e.g. food and drink, into the body (b) digestion – the breakdown of food (c) absorption – the movement of nutrients from the intestines into the blood (d) assimilation – uptake and use of nutrients … Read more
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Sourav Pan
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