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2 marksNervous Co-ordination

CAPE Biology Unit 2 · 2003 · Paper 1 · Question 5(a)

Figure 6 represents a synaptic gap between two neurones, with labels 1 to 4 and K.

Identify the structures labelled 1 to 4 in Figure 6.

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Other parts of this question

  1. 5(b)(i)What is the role of calcium ions at location 2?[2 marks]
  2. 5(b)(ii)What is the role of protein structures found on the surface of location 4?[2 marks]
  3. 5(c)(i)Suggest the effects of preventing neurotransmitter degradation on the postsynaptic neuron.[1 mark]
  4. 5(c)(ii)Suggest the effects of preventing neurotransmitter degradation on the ability of the presynaptic neuron to rebuild synaptic vesicles.[1 mark]
  5. 5(d)Give TWO reasons why the method of transmission at K increases the ability of the synapse to exert controls.[2 marks]

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