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
A person is suddenly frightened.
Which hormone is released to raise their heart rate and prepare the body for action?
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Which type of muscle produces peristalsis, and is the movement under conscious control?
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Which muscles act as the effectors that change a person's breathing?
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Which cells in the liver carry out the work of regulating the nutrients in the blood?
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Which is a role of vitamin C (ascorbic acid) in humans?
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What is meant by an essential nutrient?
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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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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 part of the brain acts as the control centre for ventilation rate?
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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 structure acts as the heart's natural pacemaker, starting each heartbeat?
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What is the main function of the large intestine in a healthy person?
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Which factor ALWAYS raises a person's heart rate?
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Which change in the blood is the main signal that makes a person breathe faster?
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State one body effect of testosterone and one body effect of epinephrine (adrenaline).
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Name one digestive enzyme secreted by the exocrine cells of the pancreas, and state the food molecule it breaks down.
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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 carbohydrate in which the liver stores glucose when the blood glucose level is high.
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