Available Answers

1. 1.

   Multiple choice questions:

   1. A substance secreted by gland 'X' helps to begin carbohydrate digestion. This gland is _________.
      1. the liver
      2. the pancreas
      3. a salivary gland
      4. the small intestine
   2. Bile secreted by the liver mainly helps in ____________.
      1. protecting the inner wall of the stomach
      2. breaking down fats
      3. digesting proteins
      4. digesting carbohydrates
   3. In which of these places does digestion take place?
      1. oesophagus
      2. large intestine
      3. mouth
      4. anus
   4. Which of these is not a ruminant?
      1. deer
      2. sheep
      3. elephant
      4. giraffe
   5. What is the similarity between digestion in the Amoeba and digestion in human beings?
      1. A mouth for ingestion is present in both.
      2. An alimentary canal is present in both.
      3. Both are parasites.
      4. Both follow the same five stages of nutrition.
2. 2.

   Abhijeet made a flowchart for the process of digestion in the Amoeba. He got confused and wrote them in the wrong order. Help him to correct the sequence by writing the number next to each step.

   _____________ The pseudopodia join to engulf the food.
   _____________ Digestion of food takes place inside the food vacuole.
   _____________ The Amoeba senses food using its pseudopodia.
   _____________ A food vacuole is formed.
   _____________ Digested food is absorbed.
   _____________ Food is used for various activities of the cell.

3. 3.

   Fill in the blanks and complete the table.

   Organ	Digestive juice	Activity
   i. Mouth		Breakdown of carbohydrates begins.
   ii.	Bile
   iii.	Pancreatic juice

    

4. 4.

   What do you understand by the term digestion?

5. 5.

   Mucus does not digest and food component. Why is it still an important part of the stomach's secretions?

6. 6.

   How is the small intestine designed to increase the surface area for absorption?