[单选题]
Suppose that the build-up of fatty tissue on qk73 gzxmr9wey1 wxnjq1/ g:)the t7 y iw xu*vo4v; 0n:wyk2p)cbwall of an artery decreased the radiw4) vk xcv2y:*iywtbuon;0p 7us by 10%. By how much would the pressure provided by the heart have to be increased to maintain a constant blood flow?
