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5 marksNervous Co-ordination

CAPE Biology Unit 2 · 2004 · Paper 2 · Question 7(b)

Cocaine blocks the re-uptake of the neurotransmitter dopamine into the pre-synaptic neuron. Acetylcholine is the only neurotransmitter released at the synapses between neurons and skeletal muscles. Acetylcholine is always excitatory and the drug curare blocks acetylcholine receptors. Suggest the effects that cocaine and curare would have on transmission.

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Other parts of this question

  1. 7(a)(i)Distinguish between a motor and a sensory neuron.[2 marks]
  2. 7(a)(ii)Describe the specialised structures AND the functions of the parts of a neuron.[8 marks]
  3. 7(c)Compare the transmission of an action potential along a myelinated neuron with transmission along an un-myelinated neuron.[5 marks]

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