OCR Biology: Food and Health

OBESITY caused by three main factors:

• lack of EXERCISE
• over nutrition
• UNDERACTIVE thyroid gland

An unhealthy diet can lead to CHD (coronary heart disease)

REDUCED blood flow to the heart (can lead to angina, heart attack etc)

CHD results from ATHEROsclerosis.

CHOLESTEROL REGULATION- HDLs and LDLs

cholesterol is transported in the blood in the form of HDLs and LDLs

High Density Lipoproteins (mainly protein)- transport cholesterol from the body tissues to the liver (where it is processed and broken down), reducing blood cholesterol and risk of CHD. HDLs are made from unsaturated fats (good for the…