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Combined Science: Biology

GCSE · Edexcel · foundation

QuestionsFlashcards

Disease
Defence Against Disease
Development of Medicines
- Antibiotics
  4
- Discovery & Development of New Drugs
  3
Non-Communicable Diseases
- Lifestyle & Non-Communicable Disease
  7
- Cardiovascular Disease
  6

The Organism in the Environment
Human Influences on the Environment
- Human Impact on Biodiversity
  6
- Benefits of Maintaining Biodiversity
  4
Cycles within Ecosystems

Contraception Flashcards

All 5 cards in this deck

True or false? The contraceptive pill protects the user against sexually transmitted infections (STIs).: False. Only barrier methods such as the condom give protection from STIs.
Give two ways that hormonal contraception, such as the pill, prevents pregnancy.: It prevents ovulation, and it thickens the mucus so sperm cannot reach or fertilise the ovum.
The pill contains oestrogen and/or progesterone.
How does a barrier method such as a condom prevent pregnancy?: It stops the sperm reaching the ovum, so fertilisation cannot happen.
Give one advantage and one disadvantage of using a condom as a method of contraception.: Advantage: gives protection from STIs (also non-prescription, easy to use, does not affect fertility).
Disadvantage: can split (also less effective past its use-by date, latex allergy, reduced sensitivity).
Give one advantage of hormonal contraception compared with barrier methods.: Either: when used correctly it is more effective at preventing pregnancy; or nothing needs to be done at the time of sex.