12 exam-style questions (62 marks) in three tiers. Try each one on paper first, then check the model answer and mark scheme.
Chapter 4 notes12 questions · 62 marks
Showing 12 of 12 questions
Recall and simple application
Match each term to its meaning: (a) ingestion, (b) digestion, (c) absorption, (d) egestion.
Complete the enzyme table.
| Enzyme | Substrate | End-product(s) |
|---|---|---|
| amylase | starch | ________ |
| maltase | ________ | glucose |
| protease | protein | ________ |
| lipase | ________ | fatty acids (and glycerol) |
Name (a) the vessel that carries nutrient-rich blood from the small intestine to the liver, and (b) the liver product that emulsifies fats.
State what happens to blood glucose when insulin is released, and name the organ that makes insulin.
Structured, exam-style
A sandwich contains starch and protein. Describe what happens to both food classes from the mouth to absorption, naming the enzymes and end-products involved.
Explain why the liver is called the body)s chemical processing plant. Refer to glucose–glycogen conversion, fat digestion, amino-acid processing and the breakdown of alcohol and hormones.
After a sugary drink, a person's blood glucose rises from 5.0 to 8.0 mmol/dm³ and falls back to 5.0 mmol/dm³ within 2 hours. (a) Name the hormone released and its target response. (b) Calculate the rate of fall. (c) State the hormone and liver response if the level later falls below 5.0.
Two people drink the same glucose solution. Person P's glucose returns to normal within 2 hours. Person Q's glucose is still 12 mmol/dm³ after 4 hours. (a) State which pattern suggests type 2 diabetes and why. (b) Name two risk factors for type 2 diabetes. (c) State two management measures.
Data, evaluation and explanation
A student writes: "Bile is an enzyme made in the liver that chemically digests fats into glucose." Identify and correct all three errors.
Saliva (containing amylase) was mixed with starch and kept at different temperatures; iodine tested for remaining starch.
| Temperature / °C | Time until iodine stays brown / min |
|---|---|
| 10 | 12 |
| 20 | 6 |
| 37 | 3 |
| 60 | no digestion after 30 min |
A fatty meal is eaten. Describe the complete route of the fat from ingestion to assimilation, naming every structure and enzyme involved and explaining how bile helps. End by stating one role the absorbed product plays in the body.
Explain how a negative-feedback system keeps blood glucose near 5 mmol/dm³. Your answer should describe both directions of correction, name the hormones, glands and target organ, and explain why the system fails in type 2 diabetes.
Next step
A 30-mark paper set out like a school paper, with a separate mark scheme. Give yourself 40 min.
Question paper
30 marks · 40 min · 4 pages
5 multiple-choice questions and structured questions with answer lines. Chapter 4 (digestive organs and processes; amylase, maltase, protease, lipase; hepatic portal vein; liver roles; insulin and glucagon; type 2 diabetes).
Mark scheme
PROAnswers · Marking points · 3 pages
Model answers with a mark for each creditworthy point — for marking at home or in class.