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5 marksNervous Co-ordination

CAPE Biology Unit 2 · May/June 2021 · Paper 2 · Question 2(a)(i)

Figure 3 displays a light micrograph of a motor neuron from an Ox's spinal cord.

In the space below, construct an annotated diagram of the motor neuron provided in Figure 3. Show the magnification of your drawing.

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Other parts of this question

  1. 2(a)(ii)State the TWO main functions of synapses.[2 marks]
  2. 2(a)(iii)Outline the sequence of events that occurs when an action potential reaches a synapse.[6 marks]
  3. 2(b)(i)Differentiate between the 'source' and 'sink' in relation to phloem transport.[2 marks]
  4. 2(b)(ii)Explain how the sieve elements of the phloem are loaded with solutes against a concentration gradient.[3 marks]
  5. 2(c)Discuss the mass flow theory as a mechanism of sugar transport in the phloem. Your response must include the processes labelled 1-7 and the movement of…[12 marks]

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