Keeping Healthy

• A balanced diet includes everything needed to keep the body healthy.

• Different people need different amounts of energy, because the metabolic rate varies between people

• Metabolic rate: The rate at which reactions take place in your body.

• If energy taken in < the energy used, the person will lose mass.

• The more exersize you do, the more food you need

• If the diet is unbalanced, the person can become malnourished

• If take in more energy than you need your mass will increase.

• Very overweight people are called 'Obese'.

• Obesity can lead to health problems, e.g Type 2 Diabetes

• It is also unhealthy to be very underweight.

• Exersize helps to keep the body healthy.

Cholesterol:

• Is made in the liver
• Used to make cell membranes and some hormones
• Is ESSENTIAL!
  
• Too much = Atherosclerosis - clogged up arteries

Less blood flow ---> Less O2 + glucose ---> lower rate of respiration

What affects Cholesterol?

• Your diet
• Exersize
• Liver (genetics)

HDL :

• GOOD
• High density lipoproteins
• Helps clear up bad cholesterol

LDL :

• BAD
• Low density Lipoproteins
• Litters unhealthy cholesterol

Saturated fat --> Raises cholesterol levels (e.g animal fats, butter, cheese)

Unsaturated fat --> Good for you (e.g Oils)