IB Biology SL C3.1 Integration of Body Systems Questions
Practise IB Biology SL C3.1 by tracing reflex pathways and explaining feedback control of ventilation, heart rate and body responses.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- trace reflex arcs through receptors, sensory neurons, interneurons, motor neurons and effectors
- explain feedback control of ventilation or heart rate using chemoreceptors, medulla and nerves
- connect body-system coordination to a stimulus, control centre, effector and measurable response in an evidence-based sequence
Covered syllabus points
C3.1.1—System integrationC3.1.2—Hierarchy in multicellular organismsC3.1.3—Integration of organsC3.1.4—Brain as information integration organC3.1.5—Spinal cordC3.1.6—Input through sensory neuronsC3.1.7—Output through motor neuronsC3.1.8—Nerves as bundlesC3.1.9—Pain reflex arcsC3.1.10—Cerebellum roleC3.1.11—Melatonin and sleepC3.1.12—Epinephrine (adrenaline)C3.1.13—Hypothalamus and pituitary controlC3.1.14—Heart rate feedback controlC3.1.15—Ventilation rate feedback controlC3.1.16—Peristalsis control
Learn this topic
Question 1
The diagram shows a biofilm that has formed on a tooth.
Using the diagram, explain the concept of emergent properties of biofilms.
Question 2
Why do multicellular organisms have emergent properties?
A
They have more genes than unicellular organisms.
B
Properties of unicellular organisms are enhanced by having many cells.
C
All of their genes are expressed whereas unicellular organisms express only some.
D
They show properties that can only result from the interaction of many cells.
Question 3
Draw a labelled diagram showing the interconnections between the liver, gall bladder, pancreas and small intestine.
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