Biology
# 49 Diet
The food an animal eat everyday is called diet. Most animals need 7 types of nutrients in their diet: carbohydrates, proteins, fats + water, fibre, vitamins, minerals.
The amount of energy needed is provided mainly by our carbohydrate and fat intake. Your dietary requirements depend on your age, sex and activity.
- Age: The energy demand increases until we stop growing. While children are growing they need more protein per kilogram of body weight than adults do.
- Sex: Generally, males use up more energy than females.
- Pregnant women need extra nutrients for the development of the fetus.
A. A balanced diet is a diet that contains all the main nutrients in the correct amounts and proportions to maintain good health.
B. Malnutrition is the result of not eating a balanced diet. There may be: wrong amount of food: too little or too much incorrect proportion of main nutrients lacking in one or more key nutrients
Effects of malnutrition
1. Obesity - Too much food (carbohydrate, fat or protein)
2. Coronary heart disease
Too much saturated/animal fat in the diet results in high cholesterol levels.
Cholesterol can stick to the walls of arteries, gradually blocking them.
If coronary arteries become blocked, the results can be angina and coronary heart disease.
3. Starvation
Too little food can result in starvation.
Extreme slimming diets, such as those that avoid carbohydrate foods, can result in the disease anorexia nervosa.
Starvation
4. Childhood protein-energy malnutrition (Kwashiakor): Wrong proportion of nutrients e.g. too much carbohydrates (starchy foods) and a lack of protein can lead to Kwashiakor in young children.
Kwashiakor characterized by edema, anorexia, ulcerating dermatoses.
5. Vitamin, mineral and fiber deficiency diseases - Lacking key nutrients.
The food an animal eat everyday is called diet. Most animals need 7 types of nutrients in their diet: carbohydrates, proteins, fats + water, fibre, vitamins, minerals.
The amount of energy needed is provided mainly by our carbohydrate and fat intake. Your dietary requirements depend on your age, sex and activity.
- Age: The energy demand increases until we stop growing. While children are growing they need more protein per kilogram of body weight than adults do.
- Sex: Generally, males use up more energy than females.
- Pregnant women need extra nutrients for the development of the fetus.
A. A balanced diet is a diet that contains all the main nutrients in the correct amounts and proportions to maintain good health.
B. Malnutrition is the result of not eating a balanced diet. There may be: wrong amount of food: too little or too much incorrect proportion of main nutrients lacking in one or more key nutrients
Effects of malnutrition
1. Obesity - Too much food (carbohydrate, fat or protein)
2. Coronary heart disease
Too much saturated/animal fat in the diet results in high cholesterol levels.
Cholesterol can stick to the walls of arteries, gradually blocking them.
If coronary arteries become blocked, the results can be angina and coronary heart disease.
3. Starvation
Too little food can result in starvation.
Extreme slimming diets, such as those that avoid carbohydrate foods, can result in the disease anorexia nervosa.
Starvation
4. Childhood protein-energy malnutrition (Kwashiakor): Wrong proportion of nutrients e.g. too much carbohydrates (starchy foods) and a lack of protein can lead to Kwashiakor in young children.
Kwashiakor characterized by edema, anorexia, ulcerating dermatoses.
5. Vitamin, mineral and fiber deficiency diseases - Lacking key nutrients.