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Pharmacology Chapter on Drug Diffusion

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Questions and Answers

Which of the following statements about passive diffusion is NOT true?

It requires energy in the form of ATP. (correct)

It is not saturable.

It is dependent on the concentration gradient.

It is used by the vast majority of drugs.

Aqueous diffusion is not affected by the pH of the medium.

True

What type of drugs does non-aqueous diffusion primarily involve?

Lipid soluble drugs

Drugs which closely resemble naturally occurring metabolites are involved in __________ transport.

specialized Signup and view all the answers

Match the type of drug diffusion with its characteristics:

Passive diffusion = Concentration gradient dependent, no energy required Aqueous diffusion = Water-soluble, pores ≤ 0.4 nm Non-aqueous diffusion = Lipid soluble, pH dependent Specialized transport = Carrier-mediated, resembles metabolites Signup and view all the answers