Download CE Biology Exercise (Short questions)

SQ_AnimalNutrition.doc/CE biology/ymt/aoghss
CE Biology Exercise (Short questions)
Animal nutrition
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Name the five stages of animal nutrition.
Explain why animals need to digest food.
State the meaning of a carnivore, a herbivore and an omnivore.
State the functions of teeth in
(a) man
(b) a lion respectively.
State the importance of teeth in facilitating digestion.
Distinguish between physical (mechanical) digestion and chemical digestion.
Give three examples of physical digestion and state the organ/digestive juice involved in
each case.
Name the enzyme involved in the digestion of starch, proteins and lipids and state the
final products of the digestion of these foods.
Name the four types of teeth in man and state one function for each
Name the hardest part of a mammalian tooth and state its function.
Give two reasons why the tooth is regarded as a living tissue
Name the central cavity of a mammalian tooth and two tissues found within it.
Describe how tooth decay occurs.
The following statements describe how tooth decay can be prevented. Name the type of
dental care methods/materials involved:
(a) removal of food debris between tooth crevices
(b) showing up plaques on teeth
(c) reducing acid levels on teeth
(d) increases resistance of teeth to corrosion by acid
What is the term used to describe the part of the body through which foods pass.
Name the process by which food passes through the alimentary canal. Name the nutrient
which promotes such process in the intestine.
Name the parts of the alimentary canal when physical digestion occurs
Explain why the contents of the stomach is highly acidic.
State the functions of the stomach.
Describe how the liver and gall bladder help the digestion of fats
State the functions of pancreas in facilitating the digestion of carbohydrates.
Describe how the digestion of proteins in an egg takes place in various parts of the
human alimentary canal. State the end product of protein digestion.
Explain why an over-secretion of gastric juice by the stomach can result in indigestion
in man.
How will the digestion of fats be affected if the gall bladder is removed in an operation
[手術]. Explain your answer.
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SQ_AnimalNutrition.doc/CE biology/ymt/aoghss
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Name the structure in man in which absorption of food takes place.
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State in table form, how the villus is adapted to absorption of food.
Name the processes by which food is absorbed in the villus.
Name the end products of digestion which are absorbed in the villus and body fluids
which carry these end products away from the small intestine.
Describe the fate of excess amino acids in the human body.
Describe the fate of excess fats in the human body.
Describe the fate of excess glucose in the human body.
Name the organs which help to regulate the blood glucose concentration. State what will
happen if such regulatory mechanisms do not function properly.
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Name the hormones which help to regulate the blood glucose level. Name the organ
which produces such hormones.
Name five substances which are stored in the mammalian liver.
State the functions of the colon in humans.
Explain why the faeces of man contains a high content of cellulose. State the
importance such cellulose in preventing intestinal disorder..
State the importance of water in the faeces of man.
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SQ_AnimalNutrition.doc/CE biology/ymt/aoghss
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The five stages of animal nutrition are:
Ingestion, digestion, absorption, assimilation, egestion (1 each)
Food taken by animals are mainly large, complex, insoluble compounds which cannot
pass through cell membranes
Through digestion, these foods are converted into simpler, soluble compounds which
are small enough to pass through the cell membranes of / to be absorbed by the cells of
the villus
Carnivore:
Animal which feeds on meat/other animals/animal tissue
Herbivore:
Animal which feeds on plants
Omnivore:
Animal which feeds on both plant and animal
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(a) man:
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(b) lion
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Man’s teeth break up the food into smaller pieces which
are easier to swallow
and increase the surface area of food for digestion of food by enzymes
Lion’s teeth are used to capture and kill prey and
For cutting the food into smaller pieces which are easier to swallow
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