Which of the following describes a neurotransmitter?
A chemical messenger released into the synaptic gap
A bundle of nerve fibres connecting the two hemispheres
The lobe of the brain that processes hearing
An electrical impulse that travels along an axon
40 exam-style questions on Edexcel GCSE Psychology 4.1 The brain and neuropsychology, covering 4.1.1 Structure and function of the brain, 4.1.2 Lateralisation of function, 4.1.3 Neurons and synapses, and 4.1.4 Impact of neurological damage. Each one has a worked solution and a mark scheme showing where the marks go.