CCEA A-Level Health and Social Care 0003
Promoting Quality Care
Communication in Health, Social Care and Early Years Settings
Health and Well-Being
Safeguarding Children
Adult Service Users
Holistic Therapies
Understanding the Physiology of Health and Illness
Applied Research
Body Systems and Physiological Disorders
Providing Services
Public Health and Health Promotion
Supporting the Family
Understanding Human Behaviour
Human Nutrition and Health
Human Nutrition and Health
Protein, carbohydrate and fat: functions and sources
- 3 things to know
- A2 7
Overview
Three macronutrients, main dietary function of protein and essential amino acid.
What you need to know
Answer each one before you reveal it.
Distinguish saturated from unsaturated fat and give a source of each.
Name the three macronutrients.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Name the three macronutrients.
Model answer
The three macronutrients are protein, carbohydrate and fat.
- 2
State the main dietary function of protein.
Model answer
Protein supplies the amino acids needed for the growth of new body tissue and the repair and replacement of existing tissue.
- 3
Give three functions of protein besides growth and repair.
Model answer
Protein is also used to make enzymes, hormones and antibodies, contributes to fluid balance in the blood, and can be broken down for energy when carbohydrate and fat are insufficient.
- 4
What is an essential amino acid?
Model answer
An essential amino acid is one the body cannot make for itself, so it has to be supplied by food.
- 5
Distinguish a high biological value protein from a low biological value protein.
Model answer
A high biological value protein supplies all the essential amino acids in useful amounts, while a low biological value protein is short of one or more of them.
- 6
Name three plant foods that provide high biological value protein.
Model answer
Soya, quinoa and the seeds of the hemp plant provide high biological value protein from plant sources.
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