Question 4
- (i) Name the structure illustrated in the diagram. [1 mark]
The diagram below illustrates a structure in the human buccal cavity. Study it and answer questions 4(a), 4(b) and 4(c).
(ii) Mention three other types of the structure in the buccal cavity. [3 marks]
- Name the parts labelled I, II, III, IV, V and VI. [3 marks]
- State three ways of caring for the illustrated structure. [3 marks]
Observation
Many candidates attempted this question and their performance was fair. In part (a) (i) some candidates were unable to correctly name the structure illustrated in the diagram. In part (a) (ii) they did fairly well in it. In part (b) few candidates were able to name correctly the parts labelled. In part (c) majority of the candidates were able to state ways of caring for the illustrated structure.
The expected answers are as follow:
(a)(i) STRUCTURE ILLUSTRATED IN THE DIAGRAM
- A tooth/premolar/molar.
(ii) OTHER STRUCTURES SIMILAR TO THE ILLUSTRATED STRUCTURE
- incisor
- canine
- premolar/molar
(b) PARTS LABELLED
I - enamel
II - dentine
III - sensory nerve ending
IV - gum
V - cement/cementum
VI - blood capillaries/vessels
(c) WAYS OF CARING FOR THE ILLUSTRATED STRUCTURE
- eat balanced diet/food rich in calcium/phosphorus/vitamin A, C and D
- regular brushing of teeth/remove food particles
- massage the gum with clean finger for good blood circulation
- rinse mouth with warm water/ mouth antiseptic
- reduce intake of sugary substances
- regular visit to dental centre/dentist
- avoid eating too hot/too cold food
- avoid using teeth to open bottle tops/picking teeth with sharp object.