8.1 Diet (Cambridge (CIE) O Level Biology): Flashcards
Exam code: 5090
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- FrontDiet & Deficiencies
Define balanced diet.
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Cards in this collection (12)
Define balanced diet.
A balanced diet contains all the food groups in the correct proportions.
What are the seven components of a balanced diet?
A balanced diet contains:
carbohydrates
proteins
lipids
vitamins
minerals
dietary fibre
water
Define deficiency.
A deficiency is when the diet contains too little of a food group.
Why do growing children need a higher proportion of protein in their diet?
Protein is needed for the growth and repair of tissues.
Which vitamin deficiency causes scurvy?
A deficiency of vitamin C.
Define scurvy.
Scurvy is a disease caused by a severe deficiency of vitamin C, leading to symptoms such as bleeding gums.
What causes rickets?
A severe lack of vitamin D or calcium in the diet, causing poor bone development.
What is anaemia caused by?
A lack of iron in the diet, which reduces the amount of haemoglobin made.
Iron is needed to make , the pigment in red blood cells that carries oxygen.
Iron is needed to make haemoglobin, the pigment in red blood cells that carries oxygen.
A lack of vitamin D or calcium in children causes , which results in soft, weak bones.
A lack of vitamin D or calcium in children causes rickets, which results in soft, weak bones.
True or False?
Vitamin D is needed for the body to absorb calcium.
True.
Vitamin D is required for calcium absorption, which is why a lack of it can cause rickets.
True or False?
Protein is the body's main source of energy.
False.
Carbohydrate is the body's main source of energy; protein is mainly used for growth and repair.
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