Available Answers

1. 1.

   Fill in the blanks.

   1. Milk teeth are also called temporary or _______________ teeth.
   2. Each adult human jaw contains _______________ incisors, _______________ canines, premolars and _______________ molars.
   3. Food passes from the _______________ to the oesophagus.
   4. _______________ is a j-shaped muscular organ.
   5. _______________ is a long, coiled tube that lies folded in the abdomen.
2. 2.

   If a person eats food while standing upside down, would it reach her/ his stomach?

3. 3.

   Fill in the blanks.

   1. Saliva contains an enzyme called _______________.
   2. _______________ is made in the liver and stored in the gall bladder.
   3. Glucose is converted into glycogen and stored in the _______________.
   4. _______________ changes proteins, proteoses and peptones into polypeptides.
   5. Lipase acts on fats to change them into fatty acids and _______________.
4. 4.

   Tick the most appropriate answer.

   1. the process of taking in food through the mouth is called
      1. digestion.
      2. ingestion.
      3. assimilation.
      4. absorption.
   2. Digestion begins in the
      1. large intestine.
      2. oesophagus.
      3. stomach.
      4. mouth.
   3. Which of the following in crashing and grinding food?
      1. canines
      2. molars
      3. incisors
      4. premolars
   4. The fluid produced by the stomach is called 
      1. saliva.
      2. gastric juice.
      3. bile juice.
      4. pancreatic  juice.
   5. pepsin, a protein digesting enzyme, is present in the 
      1. oesophagus.
      2. mouth.
      3. stomach.
      4. duodenum.
   6. Food is absorbed in the 
      1. mouth.
      2. small intestine.
      3. large intestine.
      4. liver.
   7. No digestion takes place in the
      1. mouth and pharynx.
      2. pharynx and oesophagus.
      3. oesophagus and stomach.
      4. pharynx and small intestine.
   8. Fats are changed into fatty acids and glycerol by the action of
      1. lipase.
      2. bile.
      3. lipids.
      4. trypsin.
   9. Glucose is stored in the form of
      1. galactose.
      2. maltose.
      3. glycerin.
      4. glycogen.
5. 5.

   Complete the following reactions.

   1. Proteins, proteoses and _______________  _______________ ​​​​​​
   2. Chyme  _______________
   3. Maltose  _______________
   4. Sucrose  _______________ + _______________
   5. Fats  _______________ + _______________
6. 6.

   Write true or false. Correct the false statements.

   1. The process of taking in food is called assimilation.
   2. saliva contains lipase which digests carbohydrates.
   3. Stomach walls produce acid and enzymes which help to digest carbohydrates.
   4. The pancreas secretes bile juice.
   5. Water is absorbed in the large intestine.