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IB Biology Topic C3.1 Integration of Body Systems (SL/HL) covers syllabus content as part of Topic C3: Organisms under Theme C: Interaction and Interdependence. Use these Notes, Questionbank, Videos, Flashcards, and Lessons to review the topic, practise exam questions, and move between notes, videos, flashcards, and lessons where available.
C3.1.1 System integration
C3.1.2 Cells, tissues, organs and body systems
C3.1.3 Integration of organs in animal bodies
C3.1.4 The brain as a central information integration organ
C3.1.5 The spinal cord as an integrating centre for unconscious processes
C3.1.6 Input to the spinal cord and cerebral hemispheres through sensory neurons
C3.1.7 Output from the cerebral hemispheres to muscles through motor neurons
C3.1.8 Nerves as bundles of nerve fibres of both sensory and motor neurons
C3.1.9 Pain reflex arcs
C3.1.10 Role of the cerebellum in coordinating skeletal muscle contraction and balance
C3.1.11 Modulation of sleep patterns by melatonin secretion as a part of circadian rhythms
C3.1.12 Epinephrine (adrenaline) secretion by the adrenal glands
C3.1.13 Control of the endocrine system
C3.1.14 Feedback control of heart rate
C3.1.15 Feedback control of ventilation rate
C3.1.16 Control of peristalsis in the digestive system
C3.1.17 Observations of tropic responses in seedlings (HL)
C3.1.18 Positive phototropism (HL)
C3.1.19 Phytohormones (HL)
C3.1.20 Auxin efflux carriers (HL)
C3.1.21 Promotion of cell growth by auxin (HL)
C3.1.22 Interactions between auxin and cytokinin (HL)
C3.1.23 Positive feedback in fruit ripening and ethylene production (HL)
