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Biology SL Paper 2 (November 2024, TZ2)

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  1. (a) Label the structures X, Y and Z on the diagram of a motor neuron. [3]
Figure region page 15
Figure region from page 15

(b) On the diagram, label the part of the axon representing resting potential with R and the depolarized part with D. [2]

Figure region page 15
Figure region from page 15

(c) The oscilloscope trace of a stimulated axon is shown. Annotate the oscilloscope trace to show depolarization. [1]

Figure region page 16
Figure region from page 16

(d) Outline the process of saltatory conduction. [2]