diet power point

power point covering all the points on the OCR AS biology specification for the human health and disease topic diet. Includes variations in dietry requirements, DRVs, malnutrition and causes and symptoms of deficiency diseases. Made as part of my revision last year from my notes and textbook.

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BALANCED DIET
A balanced diet is · Carbohydrates provide energy
needed to provide · Lipids provide energy and fatty
energy, for growth acids
and repair of cells
· Proteins provide some energy
and for our organs
and amino acids for growth and
to function
repair
properly, our food
is made up of · Vitamins regulate metabolic
nutrients that processes
perform these · Mineral Ions growth and repair,
functions. regulate metabolic processes…read more

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BALANCED DIET
PROVIDE GROWTH AND AID VITAL
ENERGY REPAIR ORGANS
Carbohydrates Proteins Lipids (fatty
acids)
Lipids Minerals Proteins (amino
acids)
Proteins Vitamins
Minerals…read more

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DIETARY REQUIREMENTS ­
Gender Variations
MALE FEMALE
ENERGY More- generally higher body Less ­ generally less living
mass & less adipose tissue tissue and more adipose
tissue that respires slowly
PROTEIN Age 11 + More ­ grow more Age 11+ Less
during adolescence and have
greater mass to repair and
replace
VITAMINS Age 11+ More vitamin b ­
for respiration and
metabolism of more tissue
MINERALS Age 11+ More calcium and Puberty to menopause More
phosphorus- develop larger iron ­ to replace
bones haemoglobin lost during
period…read more

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DIETARY REQUIREMENTS ­ Age
Variation
Energy;
-growth and high exercise level =
high
-decreases with body mass and
activity level in old age
Protein
-Increases with age up to
adolescence for growth and
repair of a higher body mass
Calcium and phosphorus
-greater when bones forming and
growing
Vitamins and minerals
-Increase as body mass increases…read more

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OTHER VARIATIONS IN DIETARY
REQUIREMENTS
High Activity = more energy
Pregnancy ­ Folic acid to prevent spina bifida
- Extra energy for growth of foetus (particularly in
last 3 months)
- Protein for rapidly dividing embryonic cells
- Vitamins A,C and D
Lactation ­ similar to pregnancy
-calcium, phosphorus and magnesium for bones
-Zinc for enzymes involved in growth…read more

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