A drug blocks the receptor molecules on the neurone after a synapse.
Which statement describes the effect of this drug?
The chemical cannot be released by the first neurone, so its impulse stops early.
The chemical binds more strongly to the next neurone, so its impulse is faster.
The chemical cannot bind to the next neurone, so no new impulse is started in it.
The chemical diffuses across the gap more quickly, so more impulses are sent.
135 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.