Question 2
The diagram below illustrates an organ in humans. Study it and answer questions 2(a) and (b).
(a) (i) Name the parts labeled I,II,III,IV and V. [5 marks]
(ii) Name the organ illustrated. [1 mark]
(b) (i) Mention two defects of the organ [2 marks]
(ii) State two ways of caring for the organ [2 marks]
Observation
Many candidates attempted this question and their performance was above average. Many candidates could name the labeled parts and identify the illustrated organ as required in Question 2(a)(i) and (ii). Candidates were also mention eye defects and ways of caring for the eye as required in Question 2(b)(i) and (ii). However many candidates lost vital marks to spelling errors.
The expected answers are as follow:
2. (a) (i) Parts labelled
I - Vitreous humour/body
II - Iris
III - Lens
IV - Suspensory ligament
V - Ciliary muscle
[Spelling must be correct to score]
(b) (i) Defects of the organ
- Myopia /short sight/near sightedness - Hypermetropia/Hypermyopia/long sight
- Astigmatism - Presbyopia/old age sight/loss of elasticity
- Strabismus/cross-eye/squint - Cataract
- Glaucoma
(ii) Ways of caring for the organ
- Eating healthy food/vitamin A rich food
- Routine eye examination/see eye specialist/doctor
- Avoid smoking/irritants/corrosive materials
- Always keep eyes clean
- Avoid use of dirty/contaminated materials/items to wipe or clean eyes
- Avoid bathing in fast flowing rivers
- Avoid reading in dim light/too close or too far from the eye/in moving vehicle
- Avoid physical blows to the eye/sharp objects
- Avoid looking directly at the sun rays/bright lights