Food and Health

Diet and Food Production

LEARNING AIMS

• Define the term ‘balanced diet’

• Explain how an unbalanced diet can lead to malnutrition especially obesity

Think, pair, share

• In groups, discuss and come up with a definition of a ‘balanced diet’

Use this website to decide whether you have a healthy diet

http://www.fineli.fi/foodbasket.php?lang=en

Food groups for a balanced diet

http://www.5aday.nhs.uk/topTips/default.htmlHealthy eating tips

Malnutrition

• Definition of malnutrition

• Obesity is a form of malnutrition-

how is obesity defined?

Body Mass Index- is it an accurate measure of obesity?

Calculating your BMI

• Measure height in cm. = __________ Square it. Height2 = __________

• Weigh yourself- mass in kg.= _____

• Apply the formula:BMI= mass in kg (Height in cm) 2

Diet and CHD•discuss the possible links between diet

and coronary heart disease (CHD)

•discuss the possible effects of a high blood cholesterol level on the heart and

circulatory system, with reference to high-density lipoproteins (HDL) and low-density

lipoprotein (LDL)

Study finds new link between childhood obesity and heart diseaseNeck arteries of obese children as young as 10 resembled those of a typical 45-

year-old, a new study has found.

The research is more evidence that the process of artery disease can begin early in life, increasing the risk of premature

heart disease in adulthood. Guardian Wednesday 12 November 2008

How old are your arteries?

Coronary heart disease

• Astra Zeneca animation

http://www.youtube.com/watch?v=fLonh7ZesKs

Animation from text book.

http://advancedsciences.cambridge.org/ocr/biology_1/animation/9908

Lipoprotein and atheroma animation

http://www.wiley.com/college/pratt/0471393878/student/animations/lipoproteins/index.html

Lipoprotein structure

The effect of diet on lipoproteins

• Low-fat diet reduces overall lipoprotein concentrations.

• High intake of saturated fats (where from?) will increase LDLs

• High intake of unsaturated fats (from?) will increase the proportion of HDLs

• Polyunsaturated fats help reduce LDLs in blood

C

A

A BCan you name A, B and C?