B1 - biology

KEEPING HEALTHY

1.1 DIET AND EXERCISE

KEY POINTS

• A balanced diet includes everything needed to keep the body healthy.
• Different people need different amounts of energy because the metabolic rate varies from person to person.
• If the energy (food) taken in is less than the energy used the person will lose mass. The more exercise you take, the more food needed.

EXAMINERS TIP

• The term "metabolic rate" is often used in exams - remember it refers to the chemical reaction in cells.

KEY WORDS

• malnourished
• metabolic rate
• inherited

1.2 WEIGHT PROBLEMS

KEY POINTS

• If you eat more food (take in more energy) than you means your mass will icrease.
• People who are very fat are said to be obese.
• Obesity can lead…