Chapter 4 - Food And Diet Flashcards

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1
Q

What is photosynthesis?

A

The way plants make their food

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2
Q

What is food needed for?

A
  • As a source of energy

- To provide material for growth

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3
Q

Name three carbohydrates?

A
  • Sugar
  • Starch
  • Cellulose
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4
Q

What is the function of starch and what foods contain starch?

A

Function : to provide energy

Foods : potatoes, pasta, bread

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5
Q

What is the function of sugar and what foods contain sugar?

A

Function : to provide energy

Foods: fruit, honey, milk

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6
Q

What is the function of Cellulose and what foods contain Cellulose?

A

Function : to prevent constipation

Foods : green vegetables, cereal

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7
Q

What is the function of Protein and what foods contain Protein?

A

Function : for growth, to repair cells, to make muscle and hair
Foods : lean meat, egg white, soya, nuts, fish

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8
Q

What is the function of fats and what foods contain fats?

A

Function : to provide insulation and as an energy store

Foods : butter, milk, cheese, oil

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9
Q

Name two types of vitamins?

A
  • Vitamin D

- Vitamin C

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10
Q

What is the function of vitamin C and what foods contain vitamin C?

A

Function : healthy skin and gums, prevent scurvy

Foods : Citrus fruits e.g. Lemons

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11
Q

What is the function of vitamin D and what foods contain vitamin D?

A

Function : strong teeth and bones, prevent rickets

Foods : Cheese, Milk, Yogurt

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12
Q

Name two types of minerals?

A
  • Iron

- Calcium

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13
Q

What is the function of iron and what foods contain iron?

A

Function : to make red blood cells, to prevent anamia

Foods : red meat, liver, cabbage

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14
Q

What is the function of calcium and what foods contain calcium?

A

Function : healthy bones and teeth

Foods : milk, tinned salmon

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15
Q

Experiment: To test for the presence of Starch

A

1) Fill a test tube with starch solution
2) add a few drops off iodine
3) iodine = blue black when starch is present
Iodine = yellow when starch is not present

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16
Q

Experiment: to test for the presence of a reducing sugar (glucose)

A

1) fill two test tubes with benedicts solution and set up a water bath
2) add glucose to one and iodine to the other
3) tube with glucose goes red brick, water stays blue

17
Q

Experiment :To test for the presence of protein

A

1) fill two test tubes with sodium hydroxide solution
2) add milk to one and water to the other
3) add copper sulphate solution
4) mixture with milk goes purple
Mixture with water remains blue

18
Q

What does diet depend on?

A
  • Your gender
  • Your age
  • Your physical activity
19
Q

Experiment : to investigate the conservation of chemical energy in food into heat energy

A

1) clamp a test tube of water and a thermometer in a retort stand
2) burn a cracker beneath the water and heat the water with using a mounted needle
3) temperature rises