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प्रश्न
How does tooth enamel get corroded? What is the preventive measure for this?
उत्तर
When the pH of our mouth falls below 5.5, tooth enamel suffers. This happens because the bacteria in our mouth converts sugar and food particles into acids, which corrode our teeth. To treat this, we should brush our teeth after eating using toothpaste that is basic in nature and will neutralise the effect, maintaining our teeth fit and fine.
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संबंधित प्रश्न
Which part of alimentary canal receives bile from the liver?
(a) oesophagus
(b) small intestine
(c) stomach
(d) large intestine
Which of the following is the correct sequence of parts as they occur in the human alimentary canal?
(a) Mouth → Stomach → Small intestine → Oesophagus → Large intestine
(b) Mouth → Oesophagus → Stomach → Large intestine → Small intestine
(c) Mouth → Stomach → Oesophagus → Small intestine → Large intestine
(d) Mouth → Oesophagus → Stomach → Small intestine → Large intestine
Define the following term:
Assimilation
List the enzymes and their action on food in the stomach and intestine.
Identify and name the four type of teeth shown below and give their functions
Give reasons for the following.
Meat eating animals have strong canines.
Mark odd one in the series:
Who is telling a lie?
Lung: I play an important role in excretion.
Which systems work together to provide the body with energy?
What are different types of cells present in the crypts of Lieberkuhn?
