(a)[4]
State the names of the neurone parts labelled A, B, C and D.
(b)[2]
Explain how the myelin sheath increases the speed of conduction of nerve impulses.
(c)[2]
Fig. 8.2 shows the changes in the membrane potential of a sensory neurone when the receptor cells are stimulated. Fig. 8.3 shows the strength of the stimuli applied to these receptor cells. Referring to Fig. 8.2 and Fig. 8.3, describe the relationship between stimulus strength and the resulting action potential.