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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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