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CAIE IGCSE Biology 14.2 Sense organs Question Bank

Practise eye and sense-organ questions by reading diagrams, reflex changes, accommodation steps and rod-cone evidence from graphs.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • identify eye structures and match cornea, iris, retina and optic nerve to functions
  • explain pupil reflex from light intensity, pupil diameter and iris muscle changes
  • use accommodation and rod-cone graphs for lens shape, fovea, blind spot and night vision

Covered syllabus points

14.2.1—Sense organs as groups of receptor14.2.2—Structures of the eye14.2.3—Function of each part of the eye14.2.4—Pupil reflex14.2.5—Pupil reflex in terms14.2.6—Accommodation to view near and distant14.2.7—Distribution of rods and cones14.2.8—Function of rods and cones14.2.9—Position of the fovea and state its

14.2 Sense organs question 1

[Maximum number: 10]

The eye is a sense organ that is part of the nervous system.

Question (a)

(a)

Explain why the eye can be described as a sense organ.

[ 2 ]

Question (b)

(b)

Fig. 5.1 is a diagram of a section through the human eye.

Fig. 5.1

Fig. 5.1

[ 4 ]

Question (i)

(i)

Draw an X on Fig. 5.1 to identify the blind spot.

[ 1 ]

Question (ii)

(ii)

Table 5.1 shows some of the parts labelled in Fig. 5.1, their names and their functions.

Complete Table 5.1.

Table 5.1

Table 5.1

[ 3 ]

Question (c)

(c)

State the names of the two effectors that contract and relax during the pupil reflex. and

[ 1 ]

Question (d)

(d)

Explain why a person is unable to focus on distant objects if the suspensory ligaments become permanently overstretched.

[ 3 ]
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