Therapeutic Index Quiz
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Questions and Answers

Which of the following best describes the Therapeutic Index?

  • The ratio between the dose that kills 5% of the animals and the dose that produces beneficial effects in 50% of the animals.
  • The ratio between the dose that kills 50% of the animals and the dose that produces beneficial effects in 50% of the animals.
  • The ratio between the dose that produces harmful effects in 50% of the animals and the dose that kills 5% of the animals.
  • The ratio between the dose that produces harmful effects in 50% of the animals and the dose that produces desirable effects in 50% of the animals. (correct)

What does LD50 represent?

  • The dose that kills 50% of the animals. (correct)
  • The dose that produces beneficial effects in 50% of the animals.
  • The dose that kills 5% of the animals.
  • The dose that kills half the animals who get that dose.

What does ED50 represent?

  • The dose that kills half the animals who get that dose.
  • The dose that produces beneficial effects in 50% of the animals. (correct)
  • The dose that kills 5% of the animals.
  • The dose that kills 50% of the animals.

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