Unit 3: Interaction and Interdependence
Topic 3.6: Integration of Body Systems Questions
Practice 20 exam-style questions for IB Biology Topic 3.6. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Identify1 mark
Which structure acts as the heart's natural pacemaker, starting each heartbeat?
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What is meant by an essential nutrient?
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Which part of the brain acts as the control centre for ventilation rate?
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Which is a role of vitamin C (ascorbic acid) in humans?
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Which factor ALWAYS raises a person's heart rate?
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What is the main function of the large intestine in a healthy person?
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Which cells in the liver carry out the work of regulating the nutrients in the blood?
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A person is suddenly frightened.
Which hormone is released to raise their heart rate and prepare the body for action?
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Blood glucose rises sharply after a meal.
How does the liver respond to bring it back toward normal?
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Which structures detect the rise in blood carbon dioxide?
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A graph shows that as the carbon dioxide concentration of the air a person breathes increases, their ventilation rate increases.
Which phrase best describes this trend?
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Which muscles act as the effectors that change a person's breathing?
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State the carbohydrate in which the liver stores glucose when the blood glucose level is high.
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State the name of the apparatus used to record the electrical activity of the heart, which doctors read to decide whether a patient needs an artificial pacemaker.
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Outline what is meant by an essential nutrient.
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A child regularly eats large amounts of potato chips.
What is the main nutritional concern?
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Which change in the blood is the main signal that makes a person breathe faster?
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What carries signals from the central nervous system to an endocrine gland so the two systems can be coordinated?
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State the gas in the blood whose concentration is monitored to control a person's ventilation rate.
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State one role of vitamin C (ascorbic acid) in humans.
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