1. Materia: Biology Senior 3
Profesora: Ma. Magdalena Ravagnan
Contenido nodal: Nutrition and transport in humans
SEGUNDO TRIMESTRE
Fecha de presentación: December 2014
A- Enzymes
1) i- Complete the table:
SUBSTRATE ENZYME PRODUCT
Starch
Protease
Fatty acids + glycerol
ii- Explain what happens to the activity of an enzyme when it is boiled.
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B- Human nutrition
1) (a) Fibre in the human diet contains a lot of cellulose that humans cannot digest.
(i) State two advantages to humans of including fibre in the diet.
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2. (b) Micronutrients are components of the diet that are only needed in very small quantities.
Name two micronutrients that are essential for the healthy development of bones and teeth.
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2) Complete the following table:
3) Fig. 6.1 shows the alimentary canal and associated organs
(a) On Fig. 6.1, Name and label the sites of each of the
following processes:
(i) absorption of water
(ii) bile production
(iii) glycogen storage
(iv) lipase production

3. (b) Name the first organ to which blood flows from the small intestine.
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(c) The cells of the surface layer of the villus are involved in absorption.
State two features of these cells that improve absorption.
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