Sign In Request Beta Access
← Back to Biology

GCSE Biology 03 — Health, Disease & Medicines

Public

Topics include Health & Disease Interactions, Epidemiology, Risk Factors & Data Analysis, Pathogens & Modes of Transmission, Bacterial Diseases, Viral & Protist Diseases, Plant Deficiencies, Diseases & Defences, The Human Immune System, and Vaccination & Herd Immunity.

Biology EN
193 cards
Study this deck on Deckloop

Preview Cards

A sample of cards from this deck.

Example explainer

A sample of the AI explainer you can generate for cards in this deck.

Health & Disease Interactions

Health is a state of physical, mental, and social well-being, while diseases can interact to increase susceptibility or severity.

Key points

  • Health is not just the absence of disease; it includes physical, mental, and social factors.
  • Communicable diseases (infectious) can spread; Non-communicable diseases (lifestyle/genetic) cannot.
  • Diseases often interact: one condition can weaken the immune system or organ function, making the body more vulnerable to another.
  • Example: HIV destroys immune cells, increasing the risk of TB.
  • Example: HPV (virus) can cause cervical cancer; obesity increases Type 2 diabetes and CVD risk simultaneously.

Worked example

Question

Explain how a communicable disease like HIV can lead to an increased incidence of non-communicable diseases or other infections.

Solution

1. Mechanism: HIV attacks the immune system (specifically helper T-cells).
2. Consequence: This reduces the body's ability to destroy other pathogens or detect abnormal cells.
3. Result: The person is more likely to contract infections (like TB) or develop cancers (like Kaposi's sarcoma) that a healthy immune system would normally prevent.

Common pitfalls

  • Thinking health is simply 'not being sick' (ignores mental/social aspects).
  • Assuming diseases always occur in isolation.
  • Confusing 'communicable' (spreads between organisms) with 'genetic' (inherited).

Prerequisites

  • Definition of a pathogen
  • Basic function of the immune system
Further resources