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Nutrition in Humans and Plants
Quick questions on The human digestive system explained: O-Level Biology
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the path of food?Show answer
Food passes along the alimentary canal in order: mouth, gullet (oesophagus), stomach, small intestine, large intestine, and out through the rectum and anus. Along the way, organs such as the liver and pancreas add digestive juices.
What is the role of bile?Show answer
Bile is made by the liver and stored in the gall bladder. It is not an enzyme. It emulsifies fats, breaking large fat droplets into many small ones, which increases the surface area for lipase to work on, speeding fat digestion. Bile is also alkaline, helping neutralise the acid from the stomach.
What is q1?Show answer
State the difference between mechanical and chemical digestion. [2 marks]
What is q2?Show answer
Name the enzyme that digests protein and state its products. [2 marks]
What is q3?Show answer
Explain the role of bile in fat digestion. [2 marks]
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