Sunday, 18 November 2012

Drug diffusion


The following factors enhance the diffusion of a drug across the blood-brain barrier

(a) high plasma protein binding
(b) high degree of ionisation at physiological pH
(c) high molecular weight
(d) high lipid solubility
(e) high plasma–brain concentration gradient


(a) false (b) false (c) false (d) true (e) true

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