(a(i))[2]
What does the term reflex action mean?
(a(ii))[1]
Suggest why reflex actions matter.
(b)[4]
Complete the sentences describing a reflex arc by filling in the missing words. Each word may be used once, more than once, or not at all. The words are: brain, effector, motor neurone, receptors, relay neurone, sensory neurone.\n\nChanges in the surroundings are detected by [BLANK] which produce an impulse in a [BLANK]. Nerve impulses move from this cell to a [BLANK]. The impulses then pass to a [BLANK]. Finally, the nerve impulse is transmitted to an [BLANK], causing the body to respond to the changes.
(c(i))[1]
At the junctions between neurone A and neurone B, there are tiny gaps. State the name of these gaps.
(c(ii))[1]
State the part of the body where neurone B is located.