MODUL F2 SCIENCE C2
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Transcript of MODUL F2 SCIENCE C2
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SMKBE@ELY2009
1
Name :
Form :
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2.1 CLASSES OF FOOD [pg.40 44]
1) Nutrition is the process of obtaining and using nutrient(________________________________________
______________________) from food.
2) Food can be divided into ___________ classes. There are: # state the function for each of the following
classes of food in the box provided.
3) The table below shows the sources, functions and effects of deficiency of vitamins.
Vitamin Sources Functions Effects of deficiency
A
B
C
D
E
K
4) Vitamins are divided into two group: ________________________ and _________________________
5) The water-soluble vitamins are ________________________________
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6) The fat-soluble vitamins are __________________________________
7) Minerals are needed by___________________________________________________________________
8)
FOOD TEST
Mineral Sources Functions Effects of deficiency
Calcium
Sodium
Iron
Iodine
Phosphorus
Potassium
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2.2 THE IMPORTANCE OF A BALANCED DIET [pg. 45 47]
1) A balanced diet contains ____________________________________________________________________________________________________________________________________________________
2) A balanced diet depends on many factors such as:i. _______________________________ v. ___________________________
ii. _______________________________ vi. ___________________________
iii. _______________________________ vii. ___________________________iv. _______________________________
3) Daily energy requirements
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4)
A person with goiter A child with kwashiorkor
ENERGY VALUE OF FOOD
1) Caloric value or energy value is __________________________________________________________
____________________________________________________________________________________
2) Energy value of carbohydrates, proteins and fats
3) 1 calorie = 4.2 joules or
1 cal = 4.2 J
PLANNING A BALANCED DIET
Group Age (years) Sex Body activity Energy requirements (kJ)
Class of food Energy value (kJ g-1)
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2.3 HUMAN DIGESTIVE SYSTEM [pg. 48 50]
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1) Digestion is __________________________________________________________________________
____________________________________________________________________________________2) Digestion occurs in an __________________________________________________________________
3) Alimentary canal:
4) Physical digestion _____________________________________________________________________
5) Chemical digestion ____________________________________________________________________
6) Enzymes are _________________________________________________________________________
7) Enzymes react effectively at a temperature of __________. There are three main kinds of enzymes in ougut. They are:
a. ____________________________________________________________________________
b. ____________________________________________________________________________c. ____________________________________________________________________________
8) Label the parts a) to l)
9) Name the digestive organ based on its function in the table below.
a)b)
c)
d)
e)
f)
g)h)
i)
j)
k)
l)
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Digestive organ Function
Food is cut into small pieces
Channels food to the stomach. The bolus moves down in a wave-like
action called peristalsis.
Digestion protein begins
Receives bile from the gall bladder and pancreatic juice from the
pancreas.Secretes pancreatic juice containing enzymes
Secretes bile to emulsify fat
Digestion of fat, protein and starch and absorption of food
Absorbs water and formation of faeces
Stores faeces
Removes feaces from the body
10) Summary of digestion
Place of
digestion
Glands Secretion Enzyme Digestive system
Mouth Salivary glands Saliva Salivary amylaseStomach Gastric glands Gastric juice Proteases
Hydrochloric acid
Duodenum Liver Bile
Pancreas Pancreaticjuice
Lower part of
smallintestine
Intestinal glands Intestinal
juice
11) Name the end products of the digestion of
a. Carbohydrates : ____________________________ b. Protein : ____________________________
c. Fats : ____________________________
PMR PRACTICE!NO. 21, 22, 23, and 24
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2.4 ABSORPTION OF DIGESTED FOOD [pg. 51]
1) Absorption of digested food is [pg. 101] ______________________________________________________2) Villi is _________________________________________________________________________________
3) The villi greatly _________________________________________________________________________
_______________________________________________________________________________________
4) Diffusion is _____________________________________________________________________________
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5) Once inside the bloodstream, _______________________________________________________________
6) From the liver, ___________________________________________________________________________7)
8)
2.5 REABSORPTION OF WATER AND DEFECATION [ pg.53 54]
1) The residue from the small intestine is _____________________________________________________2) From here, the watery residue ____________________________________________________________
3) The residue remains in the large intestine for _________________________
4) As the residue passes through the large intestine, a ___________________________________________
____________________________________________________________________________________
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5) As much as __________________________________________________________________________
6) In diarrhoea, _____________________________________________________________________________________________________________________________________________________________
7) Faeces is ____________________________________________________________________________
8) They are store in ______________________________________________________________________
9) Muscular contractions of the walls of the large intestine push ___________________________________10) Defecation is _________________________________________________________________________
11) A simplified diagram of the process in alimentary canal
EATING HABITS AND CONSTIPATION
1) Constipation is _______________________________________________________________________
2) This problem is mainly due to ___________________________________________________________
3) Roughage or _________________________________________________________________________4) Without roughage, ____________________________________________________________________
5) As a result, __________________________________________________________________________
6) This may cause _______________________________________________________________________
7) Serious constipation ___________________________________________________________________8) Constipation can usually be relieved by ____________________________________________________
2.6 HEALTHY EATING HABITS [pg. 54 56]
1) Unhealthy eating habit are ______________________________________________________________
2) The key to healthy is to _________________________________________________________________
____________________________________________________________________________________3) Food pyramid:
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4) State the problems caused by each of the following conditions.
a. Overeating : ___________________________________ b. Eating too little food : ___________________________________
c. Drinking carbonated sweet drinks : ___________________________________
d. Not eating enough vegetables : ___________________________________e. Not drinking enough water : ___________________________________
5) Read the statements carefully, and then fill in the blanks with the correct answers.a. Vegetarians do not eat ________________________________________
b. Muslims do not eat ___________________________________________
c. Hindus do not eat ____________________________________________
PMR PRACTICE!No. 25, 26, 27, 28
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REINFORCEMENT PRACTICE
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