Wednesday 20 February 2013

2.24 identify sources and describe functions of carbohydrate, protein, lipid (fats and oils), vitamins A, C and D, and the mineral ions calcium and iron, water and dietary fibre as components of the diet


Carbohydrate
immediate energy
bananas, brown rice, wholemeal foods and potatoes.

Proteine
Growth; repair
sea food, eggs, pork and soy.

Lipids
long term energy store; insulation; protection
fish, eggs, milk and beef.

Vitamin A
maintaining normal reproductiongood visionformation and maintenance of healthy skin, teeth and soft tissues of the bodyimmune function (has anti-oxidant properties).
Milk, cheese, eggs, fatty fish, yellow-orange vegetables and fruits such as carrots, pumpkin, mango, apricots, and other vegetables such as spinach, broccoli.

Vitamin C
aiding absorption of iron and copper; helps fight infection.
Blackcurrants, orange, grapefruit, guava, kiwi fruit, raspberries, sweet peppers (Capsicum), broccoli, sprouts

Vitamin D
Aids absorption of calcium.
Sunlight on skin allows the body to produce Vitamin D. Few foods contain significant amounts however main dietary sources are fortified margarine, salmon, herring, mackerel, and eggs.

Calcium
development and maintenance of bones and teethgood functioning muscles and nervesheart function
Milk, cheese, yoghurt, bony fish, legumes, fortified soy beverages and fortified breakfast cereals.

Iron
Haemoglobin in red blood cells (important for transport of oxygen to tissues)component of myoglobin (muscle protein).
Red meats – beef, lamb, veal, pork, fish, chicken and wholegrain cereals

Dietary fibre
Keeping the bowels functioning well; reduces the risk of bowl cancer
Cereals, bread, rice, beans and nuts.

Water
Chemical reactions in cells need water; respiration
water.

Some information (© Commonwealth of Australia 2005)

23 comments:

  1. thanks so much this blog is so helpful, especially with all the topic numbers!

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  2. THANK YOU! Such a helpful site, so easy to find what i'm looking for with the spec. numbers

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  3. excellent website, helped me so much! slap him ey noah!

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  4. Thank you for all the nice comments :) I'm glad its helpful!

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  5. you have no idea how helpful your site it (actually I'm sure you do) THANKS

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    Replies
    1. Haha yeah I have a slight inkling ;) Its no problem!

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    2. thankyou so much, without this i'd probably fail my GCSE biology :)

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  6. Protein doesn't have an "e" on the end

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  7. Viramin C and D have wrong functions

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  8. For water you could say that it apports minerals.
    Great blog, very helpful :)

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  9. the spelling of protein is wrong i think. :(

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  10. I thought carbohydrate was for slow release energy throughout the day and sugars was fast release energy. But anyway, these notes are so good and could not live without them in GCSE year

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  11. You're welcome Aryan Srivastava :)

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  12. spencer here

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  13. actually respiration doesnt need water. water is a product of aerobic respiration
    glucose and oxygen make CO2 and H20(and ATP)

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  14. The Biology Syllabus has changed.... New Syllabus Blog:

    http://igcse-biology-2017.blogspot.hk

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  15. more from

    http://igcse-biology-notes.blogspot.hk/2017/06/224-identify-sources-and-describe.html

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