Exam code: X807 75
Which row in the table identifies the substances absorbed into a structure found in the villus?
Structure | Substances | |
A | capillaries | fatty acids and glucose |
B | capillaries | amino acids and glycerol |
C | lacteal | amino acids and glucose |
D | lacteal | fatty acids and glycerol |
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The gas exchange surfaces in fish are called gills. Gills absorb oxygen from water.
Suggest two features of gills that increase the efficiency of absorption.
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An investigation into the effect of water temperature on the breathing rate of fish was carried out. The results are shown in the table.
Water temperature (°C) | Average breathing rate (breaths/min) |
4 | 4 |
10 | 26 |
14 | 56 |
20 | 79 |
26 | 100 |
Use these results to draw a conclusion for this investigation.
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The diagram shows a villus.
Identify the nutrients from food that are absorbed into the lacteal.
Glucose and amino acids
Glucose and fatty acids
Glycerol and fatty acids
Glycerol and amino acids
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Nutrients from food are absorbed into the villi in the small intestine.
Which of the following statements is correct?
Glucose and fatty acids are absorbed into the lacteals.
Glucose and amino acids are absorbed into the capillaries.
Glycerol and fatty acids are absorbed into the capillaries.
Glycerol and amino acids are absorbed into the lacteals.
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The diagram represents a blood capillary passing through the body cells of a mammal.
Name a gas that is transported in the direction shown by the arrow in the diagram and name this method of transport.
Gas.......................................................................................................................
Method of transport.............................................................................................
Give a feature of a capillary network that increases the efficiency of absorption of materials.
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