Which sequence correctly shows the pathway of a nerve impulse along a reflex arc?
receptor→sensory neurone→relay neurone→motor neurone→effector\text{receptor} \rightarrow \text{sensory neurone} \rightarrow \text{relay neurone} \rightarrow \text{motor neurone} \rightarrow \text{effector}receptor→sensory neurone→relay neurone→motor neurone→effector
receptor→motor neurone→relay neurone→sensory neurone→effector\text{receptor} \rightarrow \text{motor neurone} \rightarrow \text{relay neurone} \rightarrow \text{sensory neurone} \rightarrow \text{effector}receptor→motor neurone→relay neurone→sensory neurone→effector
effector→sensory neurone→relay neurone→motor neurone→receptor\text{effector} \rightarrow \text{sensory neurone} \rightarrow \text{relay neurone} \rightarrow \text{motor neurone} \rightarrow \text{receptor}effector→sensory neurone→relay neurone→motor neurone→receptor
effector→motor neurone→relay neurone→sensory neurone→receptor\text{effector} \rightarrow \text{motor neurone} \rightarrow \text{relay neurone} \rightarrow \text{sensory neurone} \rightarrow \text{receptor}effector→motor neurone→relay neurone→sensory neurone→receptor
39 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.