This question was attempted by many candidates and their performance was fair. In part (a)(i) many candidates could not correctly draw and label the forelimb of a human and in (a) (ii) candidates correctly mentioned injuries that could occur at the forelimb.
In part (b) many candidates correctly named structures of the male reproductive system. In part (c)(i) many candidates could not correctly define vitamins and in (a)(ii) candidates could not also mention deficiency disease each caused by lack of vitamin A and D.
The expected answers are as follows:
2 (a)(i) Diagram of a labelled forelimb of a humans
Labels:- Any 6 x ˝ = 3marks
Size:- 10cm - 12cm – 1 mark
CL:- not wooly ˝ 1 mark
Not broken ˝
Accuracy:- radium smaller than ulna ˝
Humerus bigger than radius or ulna ˝ 1 mark.
Neat labelling: guidelines should be ruled - ˝
Horizontal labelling - ˝( 1 mark)
Labels
I - head of humerus
II - humerus
III – radius
Iv - phalanges
V - metcarpal
VI - carpal
VII- ulna
VIII - olecranon process
NB: Spellings must be correct to score.
(ii) Injuries that could occur at the forelimb
- fracture
- dislocation
- sprain
- strain
- burn/scald
- bruise/wound
(b) Structures of the male reproductive system
- penis/erectile tissue
- scrotum
- cowper’s gland
- testis
- seminal vesicle
- sperm duct/vas deferens
- epididymis
- prostate gland.
- urethra
NB: Spellings must be correct to score.
(c)(i) Vitamins
Vitamins are essential chemical/organic compounds in the diet needed in small
quantity for healthy growth and development of the body
(ii) Deficiency Diseases caused by vitamin A and D
Vitamin A
- keratomalacia/Dry skin.
- nightblindness
- xerophthalmia.
Vitamin D
- osteomalacia/soft bones
- rickets
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