2. structures made up of one or more sensory cells for detecting stimuli

3. reactions of the body to the stimuli detected

4. light sensitive cells in the retina of the eye for black and white vision

5. special structures in the inner ear for detecting the directions of head movement

6. an eye defect of which a person can see nearby objects clearly but not distant objects

7. receptors in the membrane lining the upper part of the nasal cavity for detecting smell

8. changes in the external environment which lead to a change in the body

9. receptors in the pits on the upper surface of the tongue for detecting taste

10. the region on the retina where most cone cells are present and where the vision is the sharpest

Marks =