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WalesCombined Science

Unit 1 Biology 1: Digestion and circulation

5 dot points across 5 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How is the small intestine adapted to absorb digested food efficiently?

Absorption of the soluble products of digestion in the small intestine, and how the villi are adapted for efficient absorption.
A focused answer to the WJEC GCSE Science Double Award Unit 1 topic on absorption, covering how the soluble products of digestion are absorbed in the small intestine and how the villi are adapted for efficient absorption by diffusion and active transport.
9 min answer →

What are the parts of blood, and how does coronary heart disease affect the heart?

The components of blood and their functions, and the cause and treatment of coronary heart disease.
A focused answer to the WJEC GCSE Science Double Award Unit 1 topic on blood, covering the four components of blood and their functions, and the cause, effects and treatment of coronary heart disease.
9 min answer →

Which enzymes digest each food group, and how do we test foods for starch, sugar, protein and fat?

The action of carbohydrase, protease and lipase enzymes, the products of digestion, and the food tests for starch, reducing sugar, protein and fat.
A focused answer to the WJEC GCSE Science Double Award Unit 1 topic on digestive enzymes and food tests, covering carbohydrase, protease and lipase and their products, and the iodine, Benedict's, biuret and emulsion tests.
10 min answer →

What are the organs of the digestive system, and what does each one do?

The organs of the human digestive system and their functions, the role of mechanical and chemical digestion, and the action of bile.
A focused answer to the WJEC GCSE Science Double Award Unit 1 topic on the digestive system, covering the digestive organs and their functions, mechanical and chemical digestion, and the role of bile in emulsifying fats and neutralising stomach acid.
9 min answer →

How is the heart built, and how do the blood vessels move blood around the double circulation?

The structure of the heart, the double circulatory system, and the structure and function of arteries, veins and capillaries.
A focused answer to the WJEC GCSE Science Double Award Unit 1 topic on the heart and circulation, covering the structure of the heart, the double circulatory system, and how arteries, veins and capillaries are adapted to their functions.
9 min answer →