Question
Fig. 6.1 shows a section through a tooth.
(a) State the names of structures F, G and H.
Write your answers on Fig. 6.1.
(b) (i) State two functions of teeth.
(ii) Describe the importance of teeth in the digestion of food.
Answer/Explanation
Ans:
(a) F: enamel ;
G: dentine ;
H: (named) blood vessel / nerve / pulp (cavity) ;
(b) (i) bite / tear / cut / hold / rip ;
chewing / grinding / crushing / producing small(er) pieces /mechanical digestion ;
increases surface area (of food) ;
killing prey / defence / cleaning fur ;
(ii) produces small pieces of food ;
increases surface area ;
easier to swallow food ;
Question
(a) Teeth are involved in mechanical digestion.
What is meant by the term mechanical digestion?
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(b) Fig. 7.1 shows a section through a molar tooth.
(i) On Fig. 7.1, label parts Q and R. [2]
(ii) State two reasons why this tooth cannot be a canine tooth.
1 ………………………………………………………………………………………………………………………
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2 ………………………………………………………………………………………………………………………
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[2]
(iii) Gum disease causes the gums to shrink from position T to position S, as shown on
Fig. 7.1.
Suggest why the tooth is more likely to decay when the gums are at position S.
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…………………………………………………………………………………………………………………….. [2]
(iv) State two ways of maintaining healthy teeth.
1 ………………………………………………………………………………………………………………………
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2 ………………………………………………………………………………………………………………………
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Answer/Explanation
Ans:
