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Health Science Paper 1, Nov/Dec. 2010  
Questions: 1 2 3 4 5 6 7 8 Main
General Comments
Strength
Weakness/Remedies
Question 1

 

  1.  The diagram below is an illustration of the arrangement of teeth in the
    up
    per and lower jaws in humans. Study the diagram carefully and use it

to answer questions 1(a) to 1 (c)(i).


Question 1
(a) (i) Name the parts labelled I to VI [3 marks]
(ii) State one function each of the parts labelled II,IV and V [ 3 marks]
(b) (i) Write down the dental formula [ 2 marks]
(ii) Determine the number of teeth in the full set.[ 1 mark]
(c) (i) Mention two diseases that could affect the growth and Development of the teeth illustrated in the diagram[ 2 marks]
(ii) State two ways of caring for the teeth in humans[2 mark s]

_____________________________________________________________________________________________________

observation

This question was attempted by many candidates and their performance was fair. In part (a)(i) few candidates could not correctly name the parts labelled fully, they also wrote wrong spellings. In (a)(ii) candidates could not correctly state function of the parts labelled II,IV and V. In part (b) candidates could not correctly write down the dental formula required of them to write, in part (b}(ii) candidates could not also determine the number of
teeth in the full set. In part (c) candidates correctly mentioned diseases that could affect the growth and development of the teeth in the diagram. In (c)(ii) candidates correctly stated ways of caring for the teeth in humans.

The expected answers were a s follows:
l(a)(i) Naming the parts labelled

I

lower jaw

II

molar

III

premolar

IV

incisor

V

canine

VI

upper jaw

  (ii) Function of the parts labeled II/IV and V
Function of 1\ (Molar)
For chewing/grinding the food into small pieces
For crushing food substances
Function of IV (incisor)
Cutting pieces of flesh
Function of V (Canine)
For cutting/pieces of food substances
For biting/tearing food substances
(b)(i) Dental formula


[ii) Total number of teeth
= 32
(cHi) Diseases that could affect the growth and development of teeth illustrated
in the diagram

dental carries/tooth decay/plaque
periodontosis
gingivitis/sore in the gum/swollen gum

(ii) Ways of caring for the teeth in humans

brush the teeth regularly
avoid eating sugary/sweet things
avoid eating too hot or too cold food
avoid picking teeth with metal/sharp object
avoid using teeth to open bottle tops
avoid self medication and treatment of the teeth
consult dental surgeon/dentist
eat food rich in minerals/calcium/named
drink water containing fluorine
chew of fibrous foods to exercise teeth.

 



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