Question 6
The diagram below illustrates the oral cavity in humans. Study it and answer questions6(a) and 6(e).
(a) Identify the parts labeled I, II, III and IV. [4 marks]
(b) (i) State one function each of the parts labeled I, III and IV. [3 marks]
(ii) State two functions of the part labeled II. [2 marks]
(c) Mention four diseases that could be associated with the cavity. [4 marks]
(i) List two bones that are associated with the cavity. [2 marks]
(ii) Mention five ways of caring for the cavity. [5 marks]
Observation
This question was popular among candidates as many attempted it and their performance was generally above average. Many however lost vital marks in Question 6(a) to spelling error. Many candidates also wrongly stated ‘for tearing’ instead of ‘for cutting or biting’ as the function of III as required in Question 6(b)(ii).
The expected answers are as follow:
(a) Identify labelled parts
I – Premolar
II- Tongue
III- Incisor
IV- Molar
Note: Correct spelling scores
(b)(i) Functions of the labelled parts
I- For chewing and grinding
III- For biting/tearing/cutting
IV-For grinding
(ii) Functions of II
- aidsin mastication of food
- aids in speech
- aids in sound formation
- aids in tasting
- aids in swallowing food/turn food into bolus
(c) Diseases associated with the cavity
- Dental caries/tooth decay
- Tooth abscess
- Gingivitis/swollen gum/bleeding gum/periodontitis
- Dental plaque/ tartar
- Oral thrush
- Oral cancer
- Oral herpes
(d) Bones associated with the cavity
- Mandible/lower jaw
- Maxillae/upper jaw
(e) Ways of caring for the cavity
- Brush after each meal / brush twice daily
- Floss the teeth periodically
- Minimise the consumption of too much/excess sugar/sweets/sticky carbohydrates
- Eat healthy/balanced diet
- Do not smoke or chew tobacco
- Do not use the teeth to open bottle top/corks
- Avoid eating too hot/ cold food
- Visit the dentist regularly
- Do not use sharp object on the teeth
- Avoid eating hard bone