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103 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark
Which part of the digestive canal is involved in: formation of faeces ____.
Answer
formation of faeces large intestine
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Question 21 Mark
Which part of the digestive canal is involved in:complete digestion of food ____
Answer
complete digestion of food small intestine
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Question 31 Mark
Which part of the digestive canal is involved in: killing of bacteria ____.
Answer
killing of bacteria stomach
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Question 41 Mark
Which part of the digestive canal is involved in absorption of food ____
Answer
chewing of food buccal cavity
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Question 51 Mark
Which part of the digestive canal is involved in absorption of food ____
Answer
absorption of food small intestine
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Question 61 Mark
Where is the bile produced? Which component of the food does it help to digest?
Answer
Liversecretes the bile juice which is stored in the gall bladder. Bile plays an important role in the digestion of fats.
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Question 71 Mark
What do you mean by animal nutrition?
Answer
Animal nutrition includes requirement of nutrients, mode of intake of food, and its utilization in the body.
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Question 81 Mark
Mention the position of the rumen in ruminants.
Answer
The rumen is the sac-like structure which is present between small intestine and large intestine in ruminants.
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Question 91 Mark
What is mastication?
Answer
Mixing of saliva with chewed food is called mastication, this moisten the food and helps in swallowing food.
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Question 111 Mark
What is digestion?
Answer
Digestion is the process of breakdown of complex components of food such as carbohydrates into simpler substances that is absorbed and assimilated in the body.
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Question 121 Mark
Name the parts of the alimentary canal where: Water gets absorbed from undigested food.
Answer
Large intestine (no digestive activity takes place).
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Question 131 Mark
Why we cannot digest cellulose like the cattle do?
Answer
Cattle is grass eating animal, that contains cellulose and human being cannot have certain enzymes or bacteria to digest cellulose.
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Question 141 Mark
Define peristalsis?
Answer
The powerful muscles in oesophagus gently push food down to the stomach in a wave like action which is called peristalsis.
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Question 161 Mark
Mark the following statements as True or False. If false, write the correct statements. The large intestine is longer and wider than the small intestine of the human alimentary canal.
Answer
False.
The large intestine is smaller and wider than the small intestine of the human alimentary canal.
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Question 171 Mark
Mark $‘T’$ if the statement is true and $‘F’$ if it is false: The ruminants bring back swallowed grass into their mouth and chew it for some time. $(T/ F)$
Answer
True.
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Question 181 Mark
Fill in the blanks: The main steps of nutrition in humans are __________, __________, __________, _________ and __________.
Answer
The main steps of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion.
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Question 191 Mark
What is the role of pseudopodia in amoeba's life?
Answer
Pseudopodia helps amoeba in movement and capture of food, it is also called as false feet.
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Question 221 Mark
Fill in the blanks with suitable words: Teeth are rooted in separate in between the .
Answer
Teeth are rooted in separate sockets in between the gums.
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Question 231 Mark
Fill in the blanks using the words listed below. water, front, intestinal, salts, pseudopodia, back, vacuole Large intestine absorbs ___________ and some __________ from the undigested food.
Answer
Large intestine absorbs water and some salts from the undigested food.
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Question 241 Mark
Which part of the digestive canal is involved in:
Absorption of food ___________.
Answer
Absorption of food villi in small intestine.
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Question 271 Mark
Mark the following statements as True or False. If false, write the correct statements.
Mucus protects the stomach lining from damage.
Answer
True.
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Question 291 Mark
Which part of the digestive canal is involved in: Absorption of food _____________.
Answer
Absorption of food small intestine.
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Question 301 Mark
Name the organs involved in the digestion of food in humans.
Answer
The organs involved in digestion are mouth, oesophagus, stomach, liver, small intestine, gall bladder and large intestine.
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Question 311 Mark
Fill in the blanks: Amoeba digests its food in the ___________.
Answer
Amoeba digests its food in the food vacuole.
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Question 321 Mark
Mark $‘T’$ if the statement is true and $‘F’$ if it is false: Digestion of starch starts in the stomach. $(T/ F)$
Answer
False.
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Question 331 Mark
Which part of the digestive canal is involved in: Complete digestion of food _____________.
Answer
Complete digestion of food small intestine.
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Question 341 Mark
Following statements describe the five steps in animal nutrition. Read each statement and give one word for each statement. Write the terms that describes each process. Taking food into the body.
Answer
Ingestion.
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Question 351 Mark
What is $ORS$? When is it given?
Answer
$ORS$ stands for oral rehydration solution. It is given when body loses lot of water such as in diarrhoea.
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Question 361 Mark
The long structure of small intestine is accommodated in small space within our body. Comment.
Answer
The small intestine is about $7.5$ metre long It is accommodated in a coiled form inside our body.
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Question 391 Mark
Is there any role of liver in digestion of fats? Explain.
Answer
Yes, liver produces bile which has bile salts. These salts break large fat molecules to fine droplets. These fine droplets are further converted into fatty acids and glycerol.
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Question 401 Mark
Fill in the blanks using the words listed below.
water, front, intestinal, salts, pseudopodia, back, vacuole
Amoeba pushes out _____________ around the food and traps it in a food _____________.
Answer
Amoeba pushes out pseudopodia around the food and traps it in a food vacuole.
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Question 411 Mark
What is the approximate length of small intestine?
Answer
Small intestine is highly wiled and is about $7.5$ meters long.
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Question 431 Mark
From which organ of digestive system, the undigested faecal matter is removed?
Answer
The undigested faecal matter is removed through the anus by the process called egestion.
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Question 441 Mark
Describe alimentary canal briefly.
Answer
Alimentary canal is the tube running from mouth to anus of human and animals here digestion and absorption of food take place.
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Question 451 Mark
How food is pushed down from mouth to stomach?
Answer
Food is pushed down by movement of the wall of the food pipe.
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Question 461 Mark
What is peristalsis?
Answer
The wave-like action by which food is gently pushed from mouth to the stomach via oesophagus is called peristalsis.
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Question 471 Mark
We should not eat hurriedly. Give reason.
Answer
We should not eat hurriedly because if we ingest food in hurry or we talk or laugh while eating we experience hiccups, coughing or choking sensation.
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Question 481 Mark
Name the parts of the alimentary canal where: Digested food gets absorbed.
Answer
Small intestine (numerous villi increase the surface area for absorption).
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Question 491 Mark
Mark the following statements as True or False. If false, write the correct statements. All heterotrophs have a similar basic process of nutrition.
Answer
True.
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Question 501 Mark
What is assimilation?
Answer
The process by which absorbed food is taken by body cells and is used for energy, growth and repair is called assimilation.
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Question 511 Mark
Following statements describe the five steps in animal nutrition. Read each statement and give one word for each statement. Write the terms that describes each process. Transport of digested and soluble food from the intestine to blood vessels.
Answer
Absorption.
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Question 521 Mark
Where is the bile produced? Which component of the food does it digest?
Answer
Liver secretes bile juice that is stored in a sac called the gall bladder. The bile plays an important role in the digestion of fats.
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Question 531 Mark
Fill in the blanks: The inner wall of the small intestine has many finger-like outgrowths called ___________.
Answer
The inner wall of the small intestine has many finger-like outgrowths called villi.
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Question 541 Mark
Which part of the digestive canal is involved in: Formation of faeces _____________.
Answer
Formation of faces large intestine.
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Question 551 Mark
Define egestion.
Answer
The process of removal of faecal matter from the body through the anus is called egestion.
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Question 561 Mark
Suggest the organ of digestive system where the digestive juices from liver and pancreas is poured.
Answer
The digestive juices from liver and pancreas is poured into small intestine which helps in complete digestion and absorption of food.
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Question 571 Mark
Where is liver found in Human digestive system?
Answer
The liver is a reddish-brown gland present in the upper part of the abdomen on the right side.
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Question 581 Mark
Identify the location of salivary gland.
Answer
Salivary gland is present in the buccal cavity and it secretes saliva.
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Question 591 Mark
Choose the odd one out from each group and give reasons. stomach, liver, pancreas, salivary gland.
Answer
Stomach is the odd one. It is a digestive organ. All others are glands.
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Question 601 Mark
In which part of the human digestive system are bacteria present in the food killed? Explain how.
Answer
Bacteria in food are killed in stomach. The inner lining of stomach secretes hydrochloric acid and digestive juices which kill the bacteria in food.
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Question 611 Mark
Which part of the digestive canal is involved in:
Killing of bacteria _____________.
Answer
Killing of bacteria stomach.
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Question 621 Mark
Which part of the digestive canal is involved in:
Chewing of food _____________.
Answer
Chewing of food buccal cavity.
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Question 631 Mark
Choose the odd one out from each group and give reasons. oesophagus, small intestine, large intestine, rectum.
Answer
Small intestine is the odd one. It releases intestinal juices and is involved in digestion. All others do not take part in the digestion process.
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Question 641 Mark
Following statements describe the five steps in animal nutrition. Read each statement and give one word for each statement. Write the terms that describes each process. Removal of undigested and unabsorbed solid residues of food from the body.
Answer
Egestion.
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Question 651 Mark
Define digestion.
Answer
The process of breakdown of complex substances of food into simpler form is called digestion.
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Question 661 Mark
Name the secretions of stomach which digest food.
Answer
The inner lining of stomach secretes mucous hydrochloric acid and digestive juices.
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Question 671 Mark
Fill in the blanks with suitable words: Digestion of food starts in and gets completed in .
Answer
Digestion of food starts in buccal cavity and gets completed in small intestine.
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Question 681 Mark
Explain the role of mucus secreted by stomach.
Answer
The function of mucus is to protect the lining of stomach from the action of hydrochloric acid secreted by stomach lining.
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Question 701 Mark
What is rumination?
Answer
The partially digested food in ruminants goes to rumen and then to second chamber from where it is returned to the mouth for thorough chewing. This is called rumination.
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Question 711 Mark
Following statements describe the five steps in animal nutrition. Read each statement and give one word for each statement. Write the terms that describes each process. Breaking of complex food substances into simpler and soluble substances.
Answer
Digestion.
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Question 721 Mark
Choose the odd one out from each group and give reasons. Tongue, absorption, taste, swallow.
Answer
Absorption is the odd one. It is a digestive process that occurs in small intestine. All others are related to mouth.
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Question 731 Mark
Fill in the blanks: The largest gland in the human body is __________.
Answer
The largest gland in the human body is liver.
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Question 741 Mark
What is the function of digestive juices?
Answer
The digestive juices convert complex substances of food into simpler ones.
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Question 751 Mark
Mark the following statements as True or False. If false, write the correct statements. Tongue is attached to the roof of the mouth cavity at the back.
Answer
False.
Tongue is attached to the floor of the mouth cavity at the back.
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Question 761 Mark
Name different modes of feeding in animals?
Answer
Scraping, chewing, brewing, capturing and swallowing, sucking etc. are the different mode of feeding in animals.
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Question 771 Mark
Where is the bile produced? Which component of the food does it help to digest?
Answer
Liver secretes the bile juice which is stored in the gall bladder. Bile plays an important role in the digestion of fats.
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Question 781 Mark
Following statements describe the five steps in animal nutrition.
Read each statement and give one word for each statement.
Write the terms that describes each process.
Transportation of absorbed food to different parts of body and their utilisation.
Answer
Assimilation.
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Question 791 Mark
Name the organ responsible for removal of undigested and unabsorbed residues from human body.
Answer
Anus.
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Question 801 Mark
Windpipe runs adjacent to the foodpipe. What will happen if food particles enter the windpipe? Explain.
Answer
The windpipe carries air from the nostrils to the lungs. It runs adjacent to the foodpipe. If, by chance, food particles enter the windpipe, we feel choked, get hiccups or cough.
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Question 811 Mark
Mark $‘T’$ if the statement is true and $‘F’$ if it is false:
The tongue helps in mixing food with saliva. $(T/ F)$
Answer
True.
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Question 821 Mark
Fill in the blanks with suitable words: The alimentary canal stretches from to .
Answer
The alimentary canal stretches from mouth to anus.
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Question 831 Mark
Why does a doctor put a glucose drip to a patient who has just been operated?
Answer
This is because the patient cannot digest the food and glucose being the simplest form, get easily absorbed and provide necessary energy to patient.
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Question 841 Mark
Fill in the blanks with suitable words: is the largest gland in the human body.
Answer
liver is the largest gland in the human body.
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Question 851 Mark
Name the simple forms of carbohydrates, fats and proteins.
Answer
The food components and their simple forms are carbohydrates (glucose), fatty (fats) acids and glycerol, proteins (amino acids).
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Question 881 Mark
Name the parts of alimentary canal.
Answer
Buccal cavity, oesophagus, stomach, small intestine, large intestine, rectum and anus.
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Question 891 Mark
Name the parts of the alimentary canal where: Bile juice is produced.
Answer
Liver (produce bile, that is stored in gall bladder and helps in fats digestion).
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Question 901 Mark
Discuss the role of hydrochloric acid secreted by gastric glands.
Answer
It helps in the breakdown of food particles. It creates an acidic environment which facilitates the action.
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Question 911 Mark
Mark $‘T’$ if the statement is true and $‘F’$ if it is false: The product of photosynthesis is not a protein. $(T/ F)$
Answer
True.
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Question 931 Mark
Fill in the blanks: In photosynthesis solar energy is absorbed by the pigment called ___________.
Answer
In photosynthesis solar energy is captured by the pigment called chlorophyll.
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Question 941 Mark
Name the parts of the alimentary canal where: Taste of the food is perceived.
Answer
Tongue (contain taste buds).
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Question 951 Mark
Choose the odd one out from each group and give reasons.
liver, salivary gland, starch, gall bladder.
Answer
Starch is the odd one. It is a type of carbohydrate. All others are parts of digestive system of human.
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Question 971 Mark
Mark $‘T’$ if the statement is true and $‘F’$ if it is false:
The gall bladder temporarily stores bile. $(T/ F)$
Answer
True.
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Question 981 Mark
Fill in the blanks using the words listed below.
water, front, intestinal, salts, pseudopodia, back, vacuole
Tongue is attached at the ___________ to the floor of the mouth cavity and is free at the ___________.
Answer
Tongue is attached at the back to the floor of the mouth cavity and is free at the front.
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Question 991 Mark
Fill in the blanks using the words listed below.
water, front, intestinal, salts, pseudopodia, back, vacuole
The digestion of all food components is completed by the ____________ juice.
Answer
The digestion of all food components is completed by the intestinal juice.
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Question 1001 Mark
Fill in the blanks:
The stomach releases hydrochloric acid and ___________ juices which act on food.
Answer
The stomach releases hydrochloric acid and digestive juices which act on food.
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Question 1031 Mark
What do you mean by absorption in terms of digestion of food?
Answer
The food after digestion in stomach passes into the blood vessels in the wall of the intestine. This process is called absorption.
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