The Digestive System: The Mouth What kind of digestion do the teeth engage in? N

Question

The Digestive System: The Mouth What kind of digestion do the teeth engage in? Name the digestive enzymes present in saliva What kind of digestion do enzymes engage in? What types of molecules do these enzymes break down? What substance in saliva helps buffer the pH in the mouth? Why is buffering important here? (hint: think about structures that might be damaged by acids) Many various physiological changes occur in the flight-or-fight state. One such change is "cotton mouth". Explain why induction of the flight-or-fight state causes this side-effect.

Explanation / Answer

1.Teeth digestion

Teeth can not involve directly with digestion process. But it can involve indirectly and easier the process of digestion by doing cutting, grinding, chewing (called mastication).

2. Digestive enzymes in saliva

a) Enzyme amylase- convert the starch into smaller particles of sugar.

b) salivary lipase - fat digestion

3.pH buffer substances

a) phosphate ions- combined with hydrogen ions produce acid base balance.

b) bicarbonate ions - neutralize acide to maintain pH.

c) amino acids - from the proteins amino acids neutralize the base balance.

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