Contents
Independent final check
Explain without the key
identify
Final check
A cyclist sees a car door open just ahead and squeezes both brakes at once. Which row is correct?
identify: name or select.
| Row | How the message travels along the neurones | Where the decision to brake is made | What the nervous system does here |
|---|---|---|---|
| A | as electrical impulses | in the brain, part of the CNS | coordinates: links the eyes with the muscles of both hands so they work together |
| B | as a chemical carried in the blood | in the brain, part of the CNS | coordinates: links the eyes with the muscles of both hands so they work together |
| C | as electrical impulses | in the nerves of the arms, part of the PNS | coordinates: links the eyes with the muscles of both hands so they work together |
| D | as electrical impulses | in the brain, part of the CNS | regulates: keeps a body function, such as body temperature, at the right level |
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Scope and sources
Cambridge IGCSE Biology 0610 · 2026–2028 v3 · Original learning materials.
The nervous system (14.1.1–14.1.10): electrical impulses along neurones; the central nervous system (the brain and the spinal cord) and the peripheral nervous system (the nerves outside them); the role of the nervous system in coordinating and regulating body functions; sensory, relay and motor neurones; the simple reflex arc and the reflex action; the synapse as a junction between two neurones; and, for the Supplement, the structure of a synapse, the events at a synapse and why synapses make impulses travel in one direction only. The eye and the pupil reflex are in the module on sense organs, hormones in the module on hormones, and drugs that act at synapses are not covered.
Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.
Official Cambridge syllabus