A substance prevents neurotransmitter from being broken down after it has bound to receptors at a synapse. The neurotransmitter continues to stimulate the receiving neurone.
Which result is most likely?
the receiving neurone continues to be stimulated after the original impulse has passed
the receiving neurone stops being stimulated as soon as the original impulse has passed
the sending neurone begins to carry neurotransmitter back along the whole of its axon
the sending neurone loses its myelin as soon as the neurotransmitter has been released
43 exam-style questions on Edexcel GCSE Biology 2.3 The nervous system and brain, covering 2.3.1 Structures and functions of the brain, 2.3.2 Imaging brain function with scanning, 2.3.3 Limitations in treating nervous system damage, 2.3.4 Neurones and impulse transmission, and 2.3.5 Structure and function of a reflex arc. Each one has a worked solution and a mark scheme showing where the marks go.