a)
(i) What is digestion?
What? breakdown of food
(ii) Why is digestion necessary?
Why? make food soluble/ food can enter bloodstream/ to obtain nutrients.. - Junior Cycle Science - Question a - 2010
Question a
a)
(i) What is digestion?
What? breakdown of food
(ii) Why is digestion necessary?
Why? make food soluble/ food can enter bloodstream/ to obtain nutrients...
(... show full transcript
Worked Solution & Example Answer:a)
(i) What is digestion?
What? breakdown of food
(ii) Why is digestion necessary?
Why? make food soluble/ food can enter bloodstream/ to obtain nutrients.. - Junior Cycle Science - Question a - 2010
Step 1
What is digestion?
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Answer
Digestion is the process of breaking down food into simpler molecules that can be easily absorbed by the body.
Step 2
Why is digestion necessary?
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Answer
Digestion is necessary because it makes food soluble, allowing nutrients to enter the bloodstream and be utilized by the body.
Step 3
Name the organs labelled A and B.
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Answer
Organ A: liver
Organ B: pancreas
Step 4
Give one function of the stomach.
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Answer
One function of the stomach is to digest food by mixing it with gastric juices, which contain hydrochloric acid and digestive enzymes.
Step 5
Give one function of the large intestine.
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Answer
One function of the large intestine is to absorb water from indigestible food matter and form waste (faeces).
Step 6
Draw a bar chart, in the grid below, to compare the energy content of 100 g of foods 1-5 given in the table above.
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Answer
For the bar chart, plot the energy values (in kJ/100 g) for each food item from the table:
Food 1: 500 kJ
Food 2: 650 kJ
Food 3: 500 kJ
Food 4: 1000 kJ
Food 5: 1700 kJ
Each bar should be labeled accordingly.
Step 7
Which food constituent is primarily responsible for the high energy content of cheese? What evidence does the table provide to support your answer?
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Answer
Which? The food constituent primarily responsible is fat.
What? The evidence from the table shows that cheese has the highest fat content at 34.9 g per 100 g, leading to a high energy value of 1700 kJ.
Step 8
Describe how to test a food for the presence of fat.
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Answer
To test for fat, rub the food sample on a piece of filter paper. If a translucent spot appears, it indicates the presence of fat.
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