Selina solutions for Concise Biology [English] Class 6 ICSE chapter 4 - Digestive System [Latest edition]

Put a tick (✓) against the most appropriate alternative in the following statement.

The teeth which help in tearing the food are the:

Last molar tooth in human beings is called ______.

Put a tick (✓) against the most appropriate alternative in the following statement.

The hardest substance in your body?

Put a tick (✓) against the most appropriate alternative in the following statement.

Saliva converts starch into:

Put a tick (✓) against the most appropriate alternative in the following statement.

Proteins of the milk are converted into curd by the enzyme

Put a tick (✓) against the most appropriate alternative in the following statement.

Bile juice ¡s produced by

Write True or False in the following statement

Molars help in cutting and tearing food.

Write True or False in the following statement

Carbohydrates are digested into glucose

Write True or False in the following statement

Proteins are digested into fatty acids.

Fill in the blank.

The teeth called ______ are a total of four in number on the sides of incisors

Fill in the blank.

The _______ is a common opening of food pipe and windpipe

Fill in the blank.

Molars are meant for _____ the food.

Fill in the blanks.

Incisors are used for _____ and _____ the food.

Fill in the blank.

The _______ are used for tearing the food.

Fill in the blanks.

The ______ and ______  are used for crushing and grinding the food.

Fill in the blank.

In an adult human, there are a total of ___ teeth.

Fill in the blank.

The human teeth appear in two sets, the first set is called primary which consists of only _______  teeth

Name the following

End product of starch after digestion

Name the following

The organ where protein digestion-begins

Name the following

The organ into which the pancreatic juice and the bile juice are poured

Name the following

The enzyme which digests fat

Name the following

The simplest form of carbohydrates

Name the following

The part of alimentary canal where water from undigested food is absorbed

Name the following

The end-product of proteins after digestion

Identify and name the four type of teeth shown below and give their functions

State whether the following statement is True or False.

Wisdom tooth appears at the age of 5-6 years when the child starts going to school.

State whether the following statement is True or False.

The temporary set of teeth includes incisors, canines, and premolars only.

State whether the following statement is True or False.

The ducts from the salivary glands open into the duodenum.

State whether the following statement is True or False.

Saliva changes starch into maltose.

Fill in the blanks in the table (1-5) by selecting the suitable names of substances from the list given below:
(steapsin, peptones, fatty acids, proteoses, protein).

Name the juice secreted by the liver.

Name the organ where the juice bile is temporarily stored.

What is the main function of bile?

Name the three enzymes found in pancreatic juice.
(i)____ (ii)____ (iii)_____

Name the three regions of the large intestine.

Given alongside is the diagram of the human alimentary canal.
(i) Name the parts 1-11 indicated by guidelines.
1.____ 2.____ 3.____ 4.____ 5.____ 6.____ 7.____ 8.____ 9.____ 10.___ 11.____
(ii) State the function of the juice secreted by the part 1.
(iii) State the function of the three enzymes found in the juice secreted by part 3.

Define the term nutrition.

What is the role of the liver and the pancreas respectively in the digestion of food?

Name the digestive juice secreted by the stomach and give its function.

Name the types of teeth seen in humans.

How is the small intestine best suited for the digestion and absorption of food?

What do you mean by the absorption of food?

Define the following term:

Egestion

Define the following term:

Digestion

Define the following term:

assimilation

Rewrite the following parts of the human alimentary canal in their correct sequence Stomach, Oesophagus, Large instestine, Small intestine, Pharynx.

What is the fate of excess glucose in our body?

Define the term ‘digestion’.

State the four ways in which saliva is useful to us.

Food are classified into three groups on the basis of the function they perform in our body. Name the three categories, and briefly give their functions. Also give their two sources each.

Fill in the blanks.

Grinding of food is brought about by _______ and ______

Fill in the blank.

Steapsin is also called _________

Fill in the blank.

Saliva contains salivary amylase which changes starch to _____.

Fill in the blank.

Peristalsis is caused by _____________________________.

Fill in the blanks.

Pepsin acts on ________ to change them into _______ and __________.

Fill in the blanks.

______ and ______ help in digestion but food does not pass through them.

Fill in the blanks.

Removal of undigested food is called ________.

Write true or false for the below statement. Rewrite the false statements correctly.

The process of taking in food is called assimilation

Write true or false for the below statement. Rewrite the false statements correctly.

The pancreas secretes bile juice

Write true or false for the below statement. Rewrite the false statements correctly

Pancreatic juice does not contain any enzyme.

Write true or false for the below statement. Rewrite the false statements correctly.

Saliva contains lipase which digests carbohydrates

Write true or false for the below statement. Rewrite the false statements correctly.

The wave-like motion of stomach muscles to push the food is called peristalsis.

Write true or false for the below statement. Rewrite the false statements correctly.

Digestion of food in the intestine takes place in the presence of dilute hydrochloric acid.

Write true or false for the below statement. Rewrite the false statements correctly.

Absorption of food takes place in small intestine

Write true or false for the below statement. Rewrite the false statements correctly.

Water is absorbed in large intestine

Write true or false for the below statement. Rewrite the false statements correctly.

The removal of faeces through the anus is called excretion.

Write true or false for the below statement. Rewrite the false statements correctly.

All the absorbed nutrients are immediately required by the body.

Put the following processes in their correct sequence of occurrence during digestion.
peristalsis; tongue pushes the food; grinding and mixing saliva; cutting and tearing of food

Find the odd one out. Give reasons for your choice

Find the odd one out. Give reasons for your choice.

Find the odd one out. Give reasons for your choice.

Find the odd one out. Give reasons for your choice.

Give reasons for the following.

Meat eating animals have strong canines.

Give reasons for the following:

All teeth in the mouth are not alike.

Differentiate between

Digestion and Absorption

Differentiate between.

Mechanical digestion and Chemical digestion

Differentiate between

Small intestine and Large intestine

Write short answers

What is ingestion?

Write short answers

What is dental plaque?

Write short answers

Define homodont dentition.

Write short answers

What is peristalsis?

Write short answers

What do you mean by the emulsification of fat?

Write short answers

Write the names of three enzymes which are found in pancreatic juice.

Complete the following enzymatic reaction.

Proteins \[\ce{->[pepsin]}\] ___________+__________

Complete the following enzymatic reaction.

Fats \[\ce{->[lipase]}\] ___________+__________

Complete the following enzymatic reaction.

Maltose \[\ce{->[maltase]}\] ___________

Complete the following enzymatic reaction.

Sucrose  \[\ce{->[sucrase]}\] ___________+ __________

Answer in detail.

What is meant by digestion? How does it differ from nutrition?

Answer in detail.

Name the four types of teeth and their functions

Answer in detail.
Liver does not secrete any enzymes yet it helps indigestion. How?

Answer in detail.
What changes occur in food in the mouth?

Answer in detail.
What happens to the nutrients absorbed in the bloodstream from the small intestine?

Answer in detail.
You had eaten bread in the morning. Starting from the mouth, explain how it is digested?