The stages involved in producing a reflex action in which the hand is pulled away from a hot object are shown. Which is the correct order of steps? 1. Nerve impulses move from the sensory neurone to the relay neurone. 2. Nerve impulses move from motor neurone to the effector. 3. Nerve impulses move from the receptor to the neurone.
- A$1 \rightarrow 2 \rightarrow 3$
- B$2 \rightarrow 1 \rightarrow 3$
- C$3 \rightarrow 1 \rightarrow 2$
- D$3 \rightarrow 2 \rightarrow 1$