Topic Summaries

Physical and mental health

GCSE > Biology > WJEC > GCSE Biology Topic Summaries > Human health and enzymes > Physical and mental health
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Plant disease and monoclonal antibodies

The brain and the eye

Reproductive hormones and plant hormones

Genetic engineering and modification

Resource cycles and environmental change

Science skills: Measuring results

  • Health is a state of physical and mental well-being.
  • Causes of ill health include communicable disease (can pass from one organism to another), non-communicable disease (cannot pass from one organism to another, diet, stress, and life circumstances. 
  • Different types of disease may interact. For instance, defects in the immune system may mean an individual is more likely to suffer from infectious diseases, and immune reactions caused by a pathogen can trigger allergies, such as skin rashes and asthma.
  • Severe physical ill health can lead to mental illnesses, such as depression.

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