The membrane in a transdermal patch (Fig. 15.13B) is typically about 200 mm thick. Suppo...

The membrane in a transdermal patch (Fig. 15.13B) is typically about 200 mm thick. Suppose the thickness is doubled. How does that affect the rate with which the drug diffuses through the membrane?

(a) The rate is doubled.

(b) The rate is cut in half.

(c) The rate is reduced by a factor of four.