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Respiratory and Circulatory Systems — Free MYP1 Sciences Practice Questions
1QuestionBlood Vessels Arteries Veins CapillariesConcept Practice
2 marks~3 minCriterion A
The diagram shows cross-sections of an artery and a vein.
a
Identify the blood vessel that has the thicker muscular wall. [1]
b
Describe why that blood vessel needs a thicker muscular wall. [1]
Solutions
2QuestionBlood Vessels Arteries Veins CapillariesConcept Practice
2 marks~3 minCriterion A
The diagram shows a cross-section of an artery and a vein. Part X is labelled on the wall of the artery. Part Y is labelled inside the vein.
a
Name the structure labelled X. [1]
b
Describe one job that structure Y does inside the vein. [1]
Solutions
3QuestionGas Exchange in the AlveoliConcept Practice
2 marks~3 minCriterion B
A student runs for different amounts of time: 0 minutes, 2 minutes, 4 minutes, and 6 minutes. After each run, the student counts the number of breaths per minute.
a
Identify the independent variable in this investigation. [1]
b
Describe what the student does to keep this a fair test. Give one example. [1]
Solutions
4QuestionStructure and Function of the Respiratory SystemConcept Practice
7 marks~11 minCriterion C
A student counted their breathing rate during four activities.
| Activity | Rest | Walking | Jogging | Running |
|---|---|---|---|---|
| Breathing rate (breaths per minute) | 12 | 16 | 22 | 29 |
a
Identify the trend in breathing rate as the activities get harder. [1]
b
Describe what happens to breathing rate during the activities. Use one number from the data in your answer. [2]
c
A friend says: "Your breathing rate is the same whether you walk or run." Describe how the data above shows this friend is wrong, and give one reason why breathing rate changes during harder exercise. [4]
Solutions
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