3. Biomaterials

Drug Delivery Systems — Quiz

Test your understanding of drug delivery systems with 5 practice questions.

Practice Questions

Question 1

Which mathematical model is most appropriate for describing drug release from a matrix system where the drug is dispersed in an insoluble polymer and release is primarily governed by diffusion, often resulting in a release rate proportional to the square root of time?

Question 2

In the context of drug delivery, what is the primary challenge associated with the 'enhanced permeability and retention (EPR) effect' for passive tumor targeting?

Question 3

Consider a drug delivery system employing a pH-sensitive polymer for oral administration. If the polymer is designed to release an acidic drug in the small intestine (pH $\approx$ 6-7), what characteristic would the polymer likely exhibit at gastric pH (pH $\approx$ 1-2) to prevent premature drug release?

Question 4

Which of the following describes a key advantage of using aptamers for active targeting in drug delivery systems compared to antibodies?

Question 5

In a diffusion-controlled reservoir system, if the thickness of the rate-controlling membrane is doubled, what is the expected effect on the steady-state drug release rate, assuming all other factors remain constant?