Involuntary actions happen because nerve impulses pass through the parts of reflex arcs. Fig. 4.1 shows the structures involved in moving the hand.
(a)[5]
Complete Table 4.1 by giving the functions, names and letters used to identify the structures in Fig. 4.1.
(b)[4]
Describe how an impulse passes across the synapse shown in Fig. 4.2.
(c)[1]
State one example of a reflex action that occurs in the eye.
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