B1 - biology

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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…

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