FRANK Solutions for Class 9 Biology Chapter 16 - Digestive System

Understand the concept of digestion effectively with TopperLearning’s Frank Solutions for ICSE Class 9 Biology Chapter 16 Digestive System. Learn about the enzymes of pancreatic juice and how they help in the process of digestion. Also, revise answers about the enzymes secreted by ileum, salivary glands and stomach.

To help you practice your knowledge about the digestive system, the Frank textbook includes MCQs. You can also find answers for these questions in our chapter solutions. In addition, you can glance through our other ICSE Class 9 Biology study materials such as Selina solutions, practice tests and more for a thorough exam preparation.

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Chapter 16 - Digestive System Exercise 151

Question 1
What do you mean by nutrition? Mention the different types.
Solution 1
Nutrition can be defined as the process which involves the utilization of food by an animal to obtain energy for growth and development. There are two types of nutrition - autotrophic and heterotrophic.
Question 2
Define with examples:
(a) Autotrophs
(b) Heterotrophs
(c) Carnivores
(d) Omnivores
(e) Herbivores
Solution 2
(a) Autotrophs: These are the organisms which prepare organic food in their body from simple inorganic materials like carbon dioxide, water, etc. Example - green plants and certain protests.
(b) Heterotrophs: The organisms which cannot prepare their own food and depends on ready-made food synthesized by green plants are called heterotrophs. Examples - animals and human beings.
(c) Carnivores: The organisms which feed upon other animals and animal products. Examples - tiger, lion, cat, etc.
(d) Omnivores: The organisms which feed on all kinds of plant and animal food are called omnivores. Examples - Cockroach and human beings.
(e) Herbivores: The organisms that feed on plants only are termed as herbivores. Examples - sheep, cow, goat, etc.
Question 3
State one difference in nutrition:
(a) Parasite and Saprophyte.
(b) Autotroph and Heterotroph.
(c) Holozoic and Saprozoic nutrition.
(d) Holophylic and Holozoic
Solution 3
(a) Parasites are the organisms that live in or on the body of another organism called host, and obtain nourishment from its body whereas saprophyte is an organism that absorbs soluble organic nutrients from dead and decaying organic matter.
(b) Autotroph is an organism which prepares organic food in their body from simple inorganic materials like carbon dioxide, water, etc. whereas heterotroph is an organism which cannot prepare its own food and depends on ready-made food synthesized by green plants.
(c) Holozoic nutrition is a nutrition in which animals survive by consuming other organisms whereas saprozoic nutrition is the nutrition in which the animals absorbs soluble organic nutrients from dead and decaying organic matter.
(d) Holophytic nutrition is the nutrition in which organisms prepare organic food in their body from simple inorganic materials like carbon dioxide, water, etc. whereas in holozoic nutrition, the animals survive by consuming other organisms.
Question 4
Name different steps involved in animal nutrition. Explain.
Solution 4
The steps involved in animal nutrition are:
(a) Ingestion - It means taking solid or liquid food inside the body.
(b) Digestion - It is the breaking down of complex insoluble food components into simple soluble substances.
(c) Absorption - It is the process by which soluble soluble digested food passes from alimentary canal into blood and lymph through intestinal villi.
(d) Assimilation - Utilization of absorbed food by different body cells is called assimilation.
(e) Egestion - Elimination of undigested food as faeces is called egestion.
Question 5
Name the types of teeth in human with functions.
Solution 5
There are four types of teeth:
(a) Incisors - These are used for cutting.
(b) Canines - These teeth are used for tearing.
(c) Premolars - For masticating the food.
(d) Molars - For grinding and masticating the food.
Question 6
Observe the diagram given alongside and answer the following:
(a) Name the parts numbered 1-8.
(b) Which parts shown in the diagram are non-living?
(c) Is the tooth suited for cutting, tearing or grinding?
(d) What is the function of parts 8 and 7?
(e) What is the total number of teeth present in adult human beings?
(f) Write the dental formula of human beings.
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Solution 6
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 7
Describe the human alimentary canal.
Solution 7
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 8
State whether the following statements are True or false:
(a) Trypsin coagulates the milk protein.
(b) Enteropeptidase activates pepsinogen into pepsin.
(c) Na+ is absorbed in intestine by sodium pump.
(d) Pancreatic amylase digests protein into amino acids.
Solution 8
(a) False
(b) False
(c) True
(d) False
Question 9
Define digestion. Describe the digestion of food in small intestine.
Solution 9
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 10
Describe protein digestion in the human.
Solution 10
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 11
Describe the following:
(a) Coagulation of milk in the digestive system.
(b) Emulsification.
(c) Digestion of fat in the intestine.
(d) Digestion of nucleic gland.
Solution 11
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 12
Describe the human salivary gland.
Solution 12
Salivary Glands - Three pairs in man and secrete 1000 to 1500 cc saliva per day.
Saliva is slightly acidic and its pH is 6.8.
There are three types of salivary glands:
(a) Parotid glands: It is the largest salivary gland and situated near the ears. It opens into oral cavity by Stenoson's duct.
(b) Sublingual glands: It is located beneath the tongue. It opens into the floor of oral cavity by duct of Rivinus.
(c) Submadibular or sub-maxillary glands: It is situated at the angles of the lower jaws. It opens inot oral cavity by Whartson's duct.
Each gland secret secretes saliva which is transported to the mouth cavity. At the time secrete saliva.
Question 13
Mark odd one in each series:
(a) Pepsin, lipase, Trypsin, rennin.
(b) Oesophagus, stomach, intestine, lungs.
(c) Bile salts, bile pigment, gall blader, rectum.
Solution 13
(a) Lipase
(b) Lungs
(c) Rectum
Question 14
Name the enzymes of pancreatic juice, the substrates they digest and the end products.
Solution 14
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 15
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Solution 15
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 16
Describe the digestion of starch.
Solution 16
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 17
Correct the spellings:
(a) Carboxytipepdase
(b) Reninne
(c) Caceum
(d) HLC
(e) Pespin
(f) Disegion
(g) Ptorein
(h) Bilirubin
Solution 17
(a) Carboxypeptidase
(b) Rennin
(c) Caecum
(d) HCl
(e) Pepsin
(f) Digestion
(g) Protein
(h) Bilirubin
Question 18
Describe the process of digestion in human beings.
Solution 18
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Question 19
Name the enzymes secreted by the following:
(a) Stomach
(b) Salivary glands
(c) Pancreas
(d) Ileum
Solution 19
(a) Stomach - Pepsin
(b) Salivary glands - Salivary amylase/Ptyalin
(c) Pancreas - Trypsin, Chymotrypsin, Carboxy peptidase, Pancreatic amylase and Pancreatic lipase.
(d) Ileum - Enterokinase, Endokinase, Aminopeptidase and Dipeptidase.
Question 20
Frank Solutions Icse Class 9 Biology Chapter - Digestive System
Solution 20
Frank Solutions Icse Class 9 Biology Chapter - Digestive System