[单选题]
Suppose that the build-up of fatty tissue onn b)i5 mrp)e8n th z 7s;tyjz*dn 4ccwl3g8/5bvtt sb.1fe wall of an artery decreased the rabgz7swvf8t4. tyj 53 ccntz* 1dsl/b; dius by 10%. By how much would the pressure provided by the heart have to be increased to maintain a constant blood flow?
