(a)[2]
Explain why the eye may be described as a sense organ.
(b)[2]
State the two components of the central nervous system.
(c(i))[1]
Place an X on Fig. 5.1 to show the blind spot.
(c(ii))[3]
Table 5.1 gives some of the parts labelled in Fig. 5.1, together with their names and functions. Complete Table 5.1.
(d)[1]
State the names of the two effectors that contract and relax in the pupil reflex.
(e)[3]
Explain why a person cannot focus on distant objects if the suspensory ligaments become permanently overstretched.