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Biology

GCSE · Edexcel

QuestionsFlashcards

Photosynthesis
Plant Structure
Transport in Plants
Plant Hormones
- Plant Hormones & Growth
  7
- Using Plant Hormones Commercially
  7

Transport in Animals
- The Need for Transport
  7
- Factors Affecting the Rate of Diffusion
  7
Respiration
- Respiration
  6
- Practical: Investigating Respiration
  5
Gas Exchange
Circulatory System
- The Blood & Blood Vessels
  6
- The Circulatory System
  8

Discovery & Development of New Drugs Flashcards

All 6 cards in this deck

What are the four main stages in developing a new medicine?: Discovery, development, preclinical testing, clinical testing.
What happens during preclinical testing of a new medicine?: The drug is tested on cultured cells and tissues, then on animals, to check toxicity, efficacy and a suitable dose.
What happens during clinical testing of a new medicine?: It is tested on healthy volunteers at low doses to check safety, then on patients to find the optimum dose and check it works.
What is a placebo in a drug trial?: A treatment with no active drug in it, given to a control group so the drug's effect can be compared with it.
What is a double-blind trial?: A trial in which neither the patient nor the doctor knows who is getting the drug and who is getting the placebo, which prevents bias.
True or false? A new medicine is first tested on human patients with the disease.: False. It is first tested on cultured cells and animals (preclinical), then on healthy volunteers, before patients.